TECHNICAL FIELD The present disclosure, in general, relates to lighting fixtures. Particularly, but not exclusively, the present disclosure relates to a luminaire assembly of a clean room. Further, embodiments of the present disclosure disclose an enclosure for the luminaire assembly of the clean room. BACKGROUND OF THE DICLOSURE Clean rooms (also referred to as ‘cleanrooms’), in general, are controlled spaces that is utilized as a part of specialized industrial manufacturing or scientific research. Clean rooms are typically characterized by a cleanliness level quantified by number of particles per cubic meter at a predetermined molecule measure. Generally, clean rooms require continuous illumination for maintaining optimal visibility during prolonged operations. Such continuous illumination may not be feasible under natural sunlight, due to which artificial lighting arrangements such as, one or more luminaire assemblies may be provisioned about ceiling and/or along the side walls of such clean rooms. The natural light is generally mitigated from entering the clean room. In general, the clean rooms are equipped with either one or more side wall luminaire assembly and/or ceiling luminaire assembly, to artificially illuminate based on requirement and/or configuration of said clean room. Said luminaire assemblies are required to be uninterruptedly operated in the clean rooms to maintain the clean room in a predefined condition. Some of such parameters which define the predefined condition may be including, but not limited to, temperature, pressure, humidity, inertness, and the other similar parameters affecting performance and/or operation of the clean room. Some of the luminaire assemblies may be periodically or intermittently decommissioned for at least one of servicing, maintenance and/or replacement, while it is apparent that remaining luminaire assembly remain operational. Conventionally, for repair and/or maintenance, the luminaire assembly is required to be removed from the clean room in to access various components therein and allow an operator to perform necessary actions. However, removal of such luminaire assembly from the clean room may be tedious and cumbersome. Also, with prolonged decommissioning of one or more luminaire assemblies, parameters being maintained for functioning of the clean room may be affected. With advent of technology, the luminaire assembly for the clean room have been developed in such a way that a portion of the luminaire assembly is extended beyond outer walls of the clean room. Such extension may provide necessary access to the maintenance personal for performing necessary repairs, maintenance and/or replacement of the luminaire assembly. On the other hand, such extensions may cause hindrance for mobility such as, tripping and obstruction about the outer walls of the clean room, due to which surroundings about the outer walls of the clean room may be unusable. Additionally, for assembling within extension of the outer walls of the clean room, the luminaire assemblies may be required to developed to be bulky which may render cumbersome for handling by the operator. Also, as the luminaire assemblies are bulky, factors affecting performance of such luminaire assembly including, but not limited to, sealing, ingress protection, vulnerability to shocks, power consumption and the like, may hindered, which inherently affects operation of the clean room. The present disclosure is directed to overcome one or more problems stated above or any other limitations associated with the conventional arts. The information disclosed in this background of the disclosure section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. SUMMARY OF THE DISCLOSURE One or more shortcomings of conventional lighting fixtures are overcome, and additional advantages are provided through the device as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure. In one non-limiting embodiment of the present disclosure, an enclosure for a luminaire assembly of a clean room is disclosed. The enclosure includes a bottom cover (also referred to as ‘frame’) supporting the luminaire assembly, in which the bottom cover includes a diffuser. The diffuser with bottom frame is fixed to a ceiling of the clean room and is exposed to a clean room side of the luminaire assembly. The enclosure further includes a top cover substantially flush with the ceiling of the clean room and pivotally operable relative to the bottom cover. The top cover is exposed to a bay side of the clean room, in which the top cover includes at least one aligning member (as Guide) at a periphery of the top cover and extending towards the bottom cover. The at least one aligning member is structured to engage a peripheral portion of at least one of the ceiling and the bottom cover, to align the top cover relative to the bottom cover. In an embodiment of the present disclosure, the enclosure includes one or more reinforcing members, defined on the top cover. The one or more reinforcing members enable the top cover to form a pavement in the bay side. In an embodiment of the present disclosure, the enclosure includes an actuation unit coupled to the top cover. The actuation unit is structured to selectively actuate and de-actuate a switch in the bottom cover based on relative position between the top cover and the bottom cover, to control operation of the luminaire assembly. In an embodiment of the present disclosure, the switch is configured to maintain the luminaire assembly to an ON condition, when the top cover is parallelly aligned in the ceiling relative to the bottom cover. In an embodiment of the present disclosure, the switch is configured to operate the luminaire assembly to an OFF condition, when the top cover is pivotally positioned relative to the bottom cover. In an embodiment of the present disclosure, the enclosure includes a hinge mechanism coupled to one side of the top cover. The hinge mechanism is structured to operatively disengage the top cover, when displaced in a defined direction, to allow dislodging of the top cover from the ceiling of the clean room. In an embodiment of the present disclosure, the enclosure includes a dampener disposed between the top cover and a printed circuit board of the luminaire assembly. The dampener is configured to absorb mechanical shocks from the top cover and maintain relative position of the printed circuit board. In an embodiment of the present disclosure, the enclosure includes a bracket assembly configured to connect the bottom cover to the ceiling of the clean room. The bracket assembly includes 8 Nos. of mounting brackets that are rigidly connected to the ceiling and are overhanging above the bottom cover. The bracket assembly further includes a pair of female brackets, coupled to each side of the bottom cover, and exposed to the ceiling. The pair of female brackets are configured to receive at least one fastener to connect each side of the bottom cover with a mounting bracket of the pair of mounting brackets. In an embodiment of the present disclosure, the bottom cover is defined with a chamfer portion about a connection region with the ceiling, to vary contact surface between the ceiling and the bottom cover. In an embodiment of the present disclosure, the enclosure includes a sealing assembly connectable to the bottom cover. The sealing assembly includes a first sealing member, provisioned between the bottom cover and the ceiling. The first sealing member is configured to provide an impermeable radial flow path from the clean room side of the luminaire assembly. The sealing assembly further includes a second sealing member, provisioned between the diffuser of the bottom cover and the luminaire assembly. A pressure plate is configured to peripherally hold the second sealing member to provide an impermeable axial flow path from the clean room side of the luminaire assembly. In another non-limiting embodiment of the present disclosure, a luminaire system for a clean room is disclosed. The system includes a plurality of luminaire assemblies, configured to illuminate a clean room. Each of the plurality of luminaire assemblies includes a printed circuit board and an enclosure. The enclosure includes a bottom cover supporting the luminaire assembly. The bottom cover includes a diffuser fixed to a ceiling of the clean room and exposed to a clean room side of the luminaire assembly. The enclosure further includes a top cover that is substantially flush with the ceiling of the clean room and is pivotally operable relative to the bottom cover. The top cover is exposed to a bay side of the clean room. The top cover includes at least one aligning member at a periphery of the top cover and extending towards the bottom cover. The at least one aligning member is structured to engage a peripheral portion of at least one of the ceiling and the bottom cover, to align the top cover relative to the bottom cover. It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure. The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS The novel features and characteristics of the disclosure are set forth in the appended claims. The disclosure itself, however, and further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which: Figures 1a illustrates a perspective view of an enclosure for a luminaire assembly of a clean room, in accordance with an embodiment of the present disclosure. Figures 1b illustrates a top perspective view of the enclosure of Figure 1a. Figures 1c illustrates a bottom perspective view of the enclosure of Figure 1a. Figure 1d illustrates a sectional view of the enclosure of Figure 1a. Figure 2 illustrates another perspective view of the enclosure of Figure 1a in open condition. Figure 3 illustrates the enclosure of Figure 1a showing magnified view of an alignment member, in accordance with an embodiment of the present disclosure. Figure 4 illustrates the enclosure of Figure 1a showing magnified view of an actuation unit, in accordance with an embodiment of the present disclosure. Figure 5 illustrates the enclosure of Figure 1a showing magnified view of a plurality of terminal block, in accordance with an embodiment of the present disclosure. Figures 6a to 6d are various views of a hinge mechanism in the enclosure of Figure 1a. Figure 7 illustrates a partial sectional view of the enclosure of the Figure 1a, including a dampener. Figures 8a to 8d illustrate perspective views of bracket assembly included in the enclosure of Figure 1a. Figure 9 illustrates a sealing assembly included in the enclosure of Figure 1a. Figure 10 illustrates a luminaire system, in accordance with an embodiment of the present disclosure. The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein. DETAILED DESCRIPTION While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure. It is to be noted that a person skilled in the art would be motivated from the present disclosure and would modify various constructions of the lighting device. However, such modifications should be considered to be within the scope of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to understand the embodiments of the present disclosure, so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein. The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device. Embodiments of the present disclosure disclose an enclosure for a luminaire assembly of a clean room. The enclosure includes a bottom cover (also referred to as ‘frame’) supporting the luminaire assembly, in which the bottom cover includes a diffuser. The diffuser, along with the bottom frame, is fixed to a ceiling of the clean room and is exposed to a clean room side of the luminaire assembly. The enclosure further includes a top cover substantially flush with the ceiling of the clean room and pivotally operable relative to the bottom cover. The top cover is exposed to a bay side of the clean room, in which the top cover includes at least one aligning member (also referred to as ‘guide’ or ‘guide member’) at a periphery of the top cover and extending towards the bottom cover. The at least one aligning member is structured to engage a peripheral portion of at least one of the ceiling and the bottom cover, to align the top cover relative to the bottom cover. Further, in another non-limiting embodiment of the present disclosure, a luminaire system for a clean room is disclosed. The system includes a plurality of luminaire assemblies, configured to illuminate a clean room. Each of the plurality of luminaire assemblies includes a printed circuit board and the enclosure (as described above) configured to accommodate a luminaire assembly and the printed circuit board. The following paragraphs describe the present disclosure with reference to Figures 1 to 10. In the figures, the same element or elements which have similar functions are indicated by the same reference signs. Figures 1a to 1d illustrate an enclosure (100) for a luminaire assembly (3) of a clean room. The term clean room (also referred to as ‘cleanroom’) as used herein refers to a controlled environment or a controlled space that is utilized as a part of specialized industrial manufacturing or scientific research, where such cleanroom is typically characterized by a cleanliness level quantified by number of particles per cubic meter at a predetermined molecule measure. The term ‘cleanroom’ as used herein is configured to maintain extremely low levels of particulates, such as dust, airborne organisms, or vaporised particles. The term ‘luminaire’ or ‘luminaire assembly’ (also referred to as a ‘light fixture’) as used herein refers to a complete lighting unit including at least one lamp or a plurality of lamps together with components configured to distribute light, to position and protect the lamps, and to connect the lamps to a power supply. The term ‘lamp’ as used herein refers to a light source positioned within a luminaire. The lamp may be at least one of an incandescent lamp, compact fluorescent lamp, halogen lamp, metal halide lamp, Light Emitting Diode (LED), fluorescent tube, Neon lamp, high intensity discharge lamp and low-pressure sodium lamp. In an embodiment, the lamp may be a plurality of strip of LED’s that may be connected in at least one of a series and parallel connections relative to each other. Further, Figure 1a illustrates a perspective view of the enclosure (100). Figures 1b and 1c illustrate a top perspective view and a bottom perspective view of the enclosure (100) fixed to ceiling (1) of the clean room, when viewed from exterior and interior of the clean room, respectively. Figure 1d illustrates a sectional view of the enclosure (100), with the section taken along line A-A shown in Figure 1b. Figures 2 and 3 illustrate another perspective view of the enclosure (100) in open condition, in which at least a part of the enclosure (100) being aligned substantially orthogonal relative to the ceiling (1) of the clean room. The enclosure (100) includes a bottom cover (2) (similar to a frame/supporting structure) supporting the luminaire assembly (3). The bottom cover (2) may include a diffuser (4) (also shown in Figure 1c). The term ‘diffuser’ as used herein refers to a light-scattering medium, such as, but limited to, a translucent or frosted panel. The diffuser (4) may be positioned in the path of a source of light (lamp) to balance lighting effects, to reduce the sharpness of shadows and thus soften the lighting inside the clean room. The diffuser (4) may be fixed to the ceiling (1) of the clean room such that an external surface (5) (shown in Figure 1c) of the diffuser (4) may be exposed to the interior or a ‘clean room side’ of the clean room. The term ‘interior’ of the clean room or ‘clean room side’ of the clean room, as used herein, refers to the controlled space of the clean room, which generally relates to working space/volume contained within the clean room. In other words, the term ‘clean room side’ also refers to such space over which the light from the luminaire assembly (3) is incident upon. The enclosure (100) further includes a top cover (6) (also shown in Figure 1b). As can be seen in figure 1d, the top cover (6) that is substantially flush with the ceiling (1) of the clean room. The top cover (6) may be pivotally operable relative to the bottom cover (2). The top cover (6) is positioned such that an upper surface (7) (shown in Figure 1b) is exposed to the exterior (i.e., to a bay side) of the clean room. The term ‘exterior’ of the clean room or ‘bay side’ of the clean room, as used herein, refers to external space surrounding/outside the clean room, and generally relates to space above the ceiling (1) (i.e., roof) of the clean room. In other words, the term ‘bay side’ also refers to such space over which the light from the luminaire assembly (3) is not incident upon. Particularly, the enclosure (100) of the present disclosure may be accessed from the ‘bay side’ (roof) of the clean room, by a technician or serviceman, for performing installation, servicing, and maintenance activities. Additionally, the term ‘bay side’, in the context of the present disclosure, may refer to space between the ceiling (1) holding the enclosure (1) and roof of the building/structure accommodating the clean room. Further, the top cover (6) may include at least one aligning member (8) (enlarged and illustrated in Figure 3). The at least one aligning member (8) may be positioned on a bottom surface (9) (surface opposite to the upper surface (7)) of the top cover (6). The at least one aligning member (8) may be positioned at a periphery of the top cover (6) and may extend towards the bottom cover (2). The at least one aligning member (8) is structured to engage a peripheral portion of at least one of the ceiling (1) and the bottom cover (2), to align the top cover (6) relative to the bottom cover (2). In an embodiment, the top cover (6) of the enclosure (100) may include two aligning members (8), as depicted in Figure 3. Although, the Figure 3 depicts two aligning members (8), the enclosure (100) may preferably include three aligning members (8). The top cover (6) of the enclosure (100) may include more than two aligning members (8), and preferably three aligning members (8). The aligning members (8) may be positioned on peripheral edges that are next to each other. However, the aligning members (8) may also be positioned on peripheral edges of the top cover (6) that are opposite to each other. The aligning members (8) may be positioned in a central region of the peripheral edge on which it is located. However, the aligning members (8) may also be positioned away from the central region of the peripheral edge on which it is located In an embodiment, the aligning member (8) may be an ‘L’ shaped member (similar to an angle bar) configured to engage a peripheral portion of at least one of the ceiling (1) and the bottom cover (2), to align the top cover (6) relative to the bottom cover (2). However, the aligning member (8) may also be at least one of U-profile member, I-profile member, an angled member, a wedge-shaped member, a concave curvature member and a combination of any of the said profiles. The ‘L’ shaped member may include two arms such that a first arm is attached to the bottom surface (9) of the top cover (6), while a second arm (which is substantially orthogonal to the first arm) extend towards the bottom cover (2). The first arm may be attached to the bottom surface (9) of the top cover (6) by at least one of an adhesive bonding, welding, brazing, snap-locking, and the like. While pivotally operating the top cover (6) relative to the bottom cover (2), the aligning member (8) gradually engages with at least one of the ceiling (1) and the bottom cover (2), to push or pull the top cover (6) relative to the contour defined in at least one of the ceiling (1) and the bottom cover (2) (i.e., the contour within which the top cover (6) is accommodated), to align the top cover (6) relative to the bottom cover (2). Such configuration of the aligning member (8) enables proper alignment of the top cover (6) relative to the bottom cover (2), thus preventing leakage and providing sealing of the clean room atmosphere. Referring to Figure 1b again, the enclosure (100) may include one or more reinforcing members (10), defined, or provided on the top cover (6) of the enclosure (100). The one or more reinforcing members (10) may be in the form of ribs configured to increase stiffness and provide structural rigidity to the top cover (6) of the enclosure (100). The one or more reinforcing members (10) provide additional strength to the top cover (6) and prevent damage to internal components, such as luminaire, contained within the enclosure (100), even when a technician or a serviceman walks/trips over the top cover (6). As depicted in the Figure 1b, the one or more reinforcing members (10) may be defined parallel to each other, with at least one reinforcing member (10) defined in the vicinity of peripheral edges of the top cover (6). However, the reinforcing members (10) may be defined in a crisscross or an overlapping manner, relative to each other. The one or more reinforcing members (10) enable the top cover (6) to form a pavement in the bay side of the enclosure (100). In an embodiment, the one or more reinforcing members (10) may be substantially flush with the upper surface (7) of the top cover (6). However, the one or more reinforcing members (10) may have a thickness of about 15 mm and may project above the upper surface (7) of the top cover (6). Further, the bottom cover (2) may also be defined with reinforcing members (10) to provide additional stiffness and structural rigidity to the bottom cover (2). In an embodiment, the top cover (6) defined with the reinforcing members (10) may be capable of withstanding walking load in the range of 100 to 125 kilograms. The term ‘walking load’ as used herein refers to load experienced by the top cover (6), when the technician or the serviceman walks/trips over the top cover (6). Further, as illustrated in Figure 4, the enclosure (100) may include an actuation unit (11) coupled to the top cover (6). The actuation unit (11) may be structured to selectively actuate and de-actuate a switch (not shown in the Figures) in the bottom cover (2) based on relative position between the top cover (6) and the bottom cover (2). The actuation unit (11) is configured to selectively actuate and de-actuate the switch in the bottom cover (2), to control operation of the luminaire assembly (3). In an embodiment, the actuation unit (11) may be a contact type actuation unit (11) configured to close or open a circuit, to control operation of the luminaire assembly (3). However, the actuation unit (11) may also be a non-contact type of actuation unit (11) configured to close or open a circuit, to control operation of the luminaire assembly (3). The actuation unit (11) may be configured to close the circuit when the top cover (6) is parallelly aligned in the ceiling (1) relative to the bottom cover (2). The actuation unit (11) may be configured to open the circuit when the top cover (6) is pivotally positioned relative to the bottom cover (2). In an embodiment, the switch may be configured to maintain the luminaire assembly (3) to an ON condition, when the top cover (6) is aligned parallel to the ceiling (1) relative to the bottom cover (2). Such configuration of the actuation unit (11) and the switch provide automatic switching ON of the luminaire assembly (3), when no maintenance or servicing is being carried out to the enclosure (100) and/or the luminaire assembly (3). Further, the switch may be configured to operate the luminaire assembly (3) to an OFF condition, when the top cover (6) is pivotally positioned relative to the bottom cover (2). Such configuration of the actuation unit (11) and the switch provide automatic switching OFF, of the luminaire assembly (3), when maintenance or servicing of the enclosure (100) and/or the luminaire assembly (3) is carried out. The above-described configuration of the actuation unit (11) and the switch prevent accidental operation of the luminaire assembly (3), during servicing and maintenance. In addition, the above-described configuration of the actuation unit (11) and the switch safeguards technicians and servicemen against electrical hazards and accidental operation of the luminaire assembly (3), during servicing and maintenance of the luminaire assembly (3). Referring now to Figure 5, the luminaire assembly (3) may include at least one socket (also referred to as terminal block) (12) or a plurality of terminal block (12). In an embodiment, the at least one terminal block (12) or the plurality of terminal blocks (12) may be configured to connect the at least one lamp or the plurality of lamps of the luminaire assembly (3) with a power supply unit or assembly [not shown in the Figures]. The terminal block (12) may be provided with a protective covering, a pin for a safety connection to earth ground and may be configured to reduce the risk of electric shock. The terminal blocks (12) may include at least one of insulated sleeves, insulated recesses, or automatic shutters to block apertures of the socket (12) when a plug associated with power supply unit or assembly is removed. As illustrated in Figures 6a, 6b and 6c, the enclosure (100) may include at least one hinge mechanism (13) coupled to at least one side of the top cover (6). The hinge mechanism (13) enables pivotal operation of the top cover (6) relative to the ceiling (1) and the bottom cover (2). In an embodiment the hinge mechanism (13) may be a slip-joint hinges (also known as take apart hinges, flag hinges and loose joint hinges), configured to provide quick and easy decoupling of the top cover (6) from the ceiling (1) or the bottom cover (2). The hinge mechanism (13) may be structured to operatively disengage the top cover (6) from the bottom cover (2), when displaced in a defined direction. The hinge mechanism (13) is configured to allow dislodging of the top cover (6) from the ceiling (1) of the clean room. As illustrated in Figure 6a-6c, the hinge mechanism (13) coupled to at least one side of the top cover (6), may include at least two hinge units. However, the hinge mechanism (13) may include more than two hinge units, coupled to at least one side of the top cover (6). Further, as illustrated in Figure 6d, the top cover (6) may be provisioned with a handle (25) for pivotally operating (for pulling) the top cover (6) relative to ceiling (1) and/or the bottom cover (2). The handle (25) may be a mechanical handle such as, but not limited to, a pull handle, twist handle and the like. Figure 7 illustrates a partial sectional view of the enclosure (100), with the section taken along line A-A shown in Figure 1b. The enclosure (100) may include a dampener (14) disposed between the top cover (6) and a printed circuit board (26) (shown in Figure 10) of the luminaire assembly (3). The dampener (14) is configured to absorb mechanical shocks and vibrations that may be incoming from the top cover (6) towards the ceiling (1) and the bottom cover (2). The top cover (6) and in turn the dampener (14) may be subjected to mechanical shocks and vibrations, for instance, when a technician/serviceman walks over the top cover or when the top cover (6) is displaced/removed for servicing. By absorbing mechanical shocks and vibrations, the dampener (14) maintains position of the printed circuit board (26) relative to the top cover (6) and the ceiling (1) or the bottom cover (2). The dampener (14) may be at least one a dampener such as, but not limited to, a polyurethane (PU) buffer, bush type dampener, cylindrical dampener, buffer type dampener and the like. Referring now to Figure 8a, the enclosure (100) may include at least one bracket assembly (15). The bracket assembly (15) may be configured to connect the bottom cover (2) to the ceiling (1) of the clean room. Further, as illustrated in Figure 8b, the bracket assembly (15) may include a pair of mounting brackets (16a, 16b) that are rigidly coupled to the ceiling (1) and are overhanging above the bottom cover (2). However, though figure 8b depicts only a pair of mounting brackets (16a, 16b), in an embodiment, the bracket assembly (15) may preferably include eight mounting brackets (16a, 16b). The number of mounting brackets (16a, 16b) may be varied appropriately based on parameters including, but not limited to, dimensions of the bracket assembly (15), weight of the bracket assembly (15), load bearing capacity of the bracket assembly (15) that affect stability and securement of the bracket assembly (15). The bracket assembly (15) may further include a pair of female brackets (17a, 17b), coupled to each side of the bottom cover (2), and exposed to the ceiling (1). The pair of mounting brackets (16a, 16b) and the pair of female brackets (17a, 17b) may be positioned in a substantially orthogonal manner, relative to each other. The pair of mounting brackets (16a, 16b) and the pair of female brackets (17a, 17b) may be positioned at the vicinity of a one of the corners of the contour (the contour within which the enclosure (100) is accommodated) defined in the ceiling (1). Further, the pair of female brackets (17a, 17b) may be configured to receive at least one fastener (18a, 18b) to connect each side of the bottom cover (2) with a mounting bracket (16a, 16b) of the pair of mounting brackets (16a, 16b). The at least one fastener (18a, 18b) may be fastened/unfastened to vary clearance (space/gap) available between arms of the pair of mounting brackets (16a, 16b) and the arms of the pair of female brackets (17a, 17b), to correspond to thickness of the ceiling (1). The arms of the pair of female brackets (17a, 17b) may be defined with at least one guideway (19a, 19b). The at least one guideway (19a, 19b) allows translational motion of the at least one fastener (18a, 18b) along the length of the contour against which the pair of female brackets (17a, 17b) are mounted. The above-described configuration of the pair of female brackets (17a, 17b) with at least one guideway (19a, 19b) and the at least one fastener (18a, 18b) allows for accommodating variation in thickness and profile of the ceiling (1) along the length of the contour. Further, in an embodiment, the enclosure (100) may include two pairs of bracket assembly (15), as depicted in Figure 8c. However, the enclosure (100) may also include more than two pairs of bracket assembly (15) connected between the bottom cover (2) and the ceiling (1) of the clean room. Furthermore, the at least one fastener (18a, 18b) of the bracket assembly (15) may be unfastened to detach the bottom cover (2) and/or the diffuser (4) from the ceiling (1), during cleaning and maintenance of the enclosure (100). In an embodiment, the pair of mounting brackets (16a, 16b) may be coupled to the bottom cover (2), while the pair of female brackets (17a, 17b) may be rigidly coupled to the ceiling (1). In another embodiment, the pair of mounting brackets (16a, 16b) may be coupled to the top cover (6), while the pair of female brackets (17a, 17b) may be rigidly coupled to the ceiling. In such embodiment, the luminaire assembly (3) may be accessed by removing the diffuser (4) and the bottom cover (2) from the clean room side. Figure 9 illustrates a partial sectional view of the enclosure (100), with the section taken along line A-A shown in Figure 1b. As illustrated in the Figure 9, the bottom cover (2) may be defined with a chamfer portion (20) about a connection region with the ceiling (1). The chamfer portion (20) delimits the ceiling (1) from the edges of the bottom cover (2) and/or the diffuser (4). The chamfer portion (20) may be wedge shaped or may be shaped curvilinear, relative to at least one of the ceiling (1), the bottom cover (2) and the diffuser (4). The chamfer portion (20) may be configured to vary contact surface between the ceiling (1) and the bottom cover (2). By displacing the bottom cover (2) in a defined direction, the contact surface between the ceiling (1) and the bottom cover (2) may be varied. The bottom cover (2) may be displaced in the defined direction by sliding the bottom cover (2) relative to the ceiling (1). Such sliding of the bottom cover (2) relative to the ceiling (2) varies contact area between the ceiling (1) and the bottom cover (2). In an embodiment, the chamfer portion (20) may be configured to prevent direct impact/collision of cleaning equipment against the diffuser (4) and/or the bottom cover (2), during cleaning/dusting of the ceiling (1). The chamfer portion (20), preferably shaped in form of wedge or curvilinear relative to at least one of the ceiling (1), facilitates gradual roll over of the cleaning equipment over the diffuser (4) and/or the bottom cover (2), during cleaning of the ceiling (1). In an embodiment, the enclosure (100) may include a sealing assembly (21) connectable to the bottom cover (2) of the enclosure (100). As illustrated in Figure 9, the sealing assembly (21) may include a first sealing member (22), provisioned between the bottom cover (2) and the ceiling (1). The first sealing member (22) is configured to provide an impermeable radial flow path from the clean room side of the luminaire assembly (3). The sealing assembly (21) further includes a second sealing member (23), provisioned between the diffuser (4) of the bottom cover (2) and the luminaire assembly (3). The first sealing member (22) may be provisioned throughout the periphery/perimeter of the chamfer portion (20). The second sealing member (23) may be provisioned throughout the periphery/perimeter of contact area between the diffuser (4) and the luminaire assembly (3). In an embodiment, the first sealing member (22) and the second sealing member (23) may be at least one of a non-hygroscopic cross-linked Polyethylene foam (XLPE) gasket and a Poly (methyl methacrylate) (PMMA) diffuser sheet, mounted to at least one of the bottom cover (2), the luminaire assembly (3) and the diffuser (4), by means of an adhesive. Further, a pressure plate (24) may be configured to peripherally hold the second sealing member (23) to provide an impermeable axial flow path from the clean room side of the luminaire assembly (3). The sealing assembly (21) prevents intrusion of moisture and other foreign substances into the luminaire assembly (3). In an embodiment, the sealing assembly (21) may be an airtight seal assembly that does not undergo any expansion or contraction under varying atmospheric parameters. The sealing assembly (21) further enables maintenance of clean room atmosphere as per predetermined requirements under a number of predefined parameters such as, but not limited to, temperature, pressure, humidity, chemical inertness and the other similar parameters affecting performance and/or operation of the clean room. The present disclosure further discloses a luminaire system (200) for a clean room. The system (200) includes a plurality of luminaire assemblies (3), configured to illuminate a clean room. Referring now to Figure 10 (only one luminaire assembly (3) is depicted in the figure for illustration purpose), each of the plurality of luminaire assemblies (3) includes a printed circuit board (PCB) (26) with LEDs (Light-emitting diodes) and the enclosure (100) (as described in the above paragraphs). In an embodiment, the lamps/light sources employed in the at least one luminaire assembly (3) may be strips of LED (PCB with LEDs). The strips of LED (also referred to as PCB with LEDs) may be connected in at least one of a parallel connection and series connection. Connecting the strips of LEDs in parallel connection allows for easy replacement and servicing of faulty LED strips, without requiring removal and affecting functioning of neighbouring strips of LED. Further, currently available luminaire systems employ lamps with a rating of 100 Lumens per watt (lm/W) and use lamps with a wattage specification of 42 W and 60 W. However, the luminaire system (200) of the present disclosure may be configured to employ lamps with a rating of 130 Lumens per watt (lm/W), thereby allowing use of lamps with wattage specification of 32 W and 45 W, without compromising on lighting requirements. Thus, the luminaire system (200) of the present disclosure reduces overall power consumption of the clean room. In an embodiment, the lamps/light sources employed in the at least one luminaire assembly (3) may be an upgradable light engine. In an embodiment, the enclosure (100) of the luminaire assembly (3) may be configured to accommodate lamps/light sources with varying dimensions and configurations, terminal blocks (12) of varying dimensions and electrical capacity as per requirement in the clean room. The luminaire system (200), and in-turn the enclosure (100), as an example may be employed in locations including, but not limited to, office premises, workstations, libraries, industrial shop floors, laboratories, and the like. Further, components of the luminaire system (200), and in-turn the enclosure (100), that are coupled or attached to one another may be secured by means of non-permanent fixture, such as, but not limited to, adhesive bonding, riveting, and the like. However, the components may also be secured by means of a permanent fixture including, but not limited to, welding, brazing, and the like. It is to be understood that a person of ordinary skill in the art may develop an enclosure (100) or a lighting fixture of similar configuration without deviating from the scope of the present disclosure. Such modifications and variations may be made without departing from the scope of the present invention. Therefore, it is intended that the present disclosure covers such modifications and variations provided they come within the ambit of the appended claims and their equivalents. Equivalents: With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity. It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and Cogether, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.” While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
We Claim: 1. An enclosure (100) for a luminaire assembly (3) of a clean room, the enclosure (100) comprising: a bottom cover (2), supporting the luminaire assembly (3), wherein the bottom cover (2) includes a diffuser (4), fixed to a ceiling (1) of the clean room, and exposed to a clean room side of the luminaire assembly (3); and a top cover (6), substantially flush with the ceiling (1) of the clean room and pivotally operable relative to the bottom cover (2), the top cover (6) is exposed to a bay side of the clean room, wherein the top cover (6) includes at least one aligning member (8) at a periphery of the top cover (6) and extending towards the bottom cover (2), the at least one aligning member (8) is structured to engage a peripheral portion of at least one of the ceiling (1) and the bottom cover (2), to align the top cover (6) relative to the bottom cover (2). 2. The enclosure (100) as claimed in claim 1, comprises one or more reinforcing members (10), defined on the top cover (6), wherein the one or more reinforcing members (10) enable the top cover (6) to form a pavement in the bay side. 3. The enclosure (100) as claimed in claim 1, comprises actuation unit (11) coupled to the top cover (6), wherein the actuation unit (11) is structured to selectively actuate and deactuate a switch in the bottom cover (2) based on relative position between the top cover (6) and the bottom cover (2), to control operation of the luminaire assembly (3). 4. The enclosure (100) as claimed in claim 3, wherein the switch is configured to maintain the luminaire assembly (3) to an ON condition, when the top cover (6) is parallelly aligned in the ceiling (1) relative to the bottom cover (2). 5. The enclosure (100) as claimed in claim 3, wherein the switch is configured to operate the luminaire assembly (3) to an OFF condition, when the top cover (6) is pivotally positioned relative to the bottom cover (2). 6. The enclosure (100) as claimed in claim 1, comprises a hinge mechanism (13), coupled to at least one side of the top cover (6), wherein the hinge mechanism (13) is structured to operatively disengage the top cover (6), when displaced in a defined direction, to allow dislodging of the top cover (6) from the ceiling (1) of the clean room.
7. The enclosure (100) as claimed in claim 1, comprises a dampener (14), disposed between the top cover (6) and a printed circuit board (26) of the luminaire assembly (3), wherein the dampener (14) is configured to absorb mechanical shocks from the top cover (6) and maintain relative position of the printed circuit board (26). 8. The enclosure (100) as claimed in claim 1, comprises a bracket assembly (15), configured to connect the bottom cover (2) to the ceiling (1) of the clean room, wherein the bracket assembly (15) comprising: a pair of mounting brackets (16a, 16b), rigidly connected to the ceiling (1) and overhanging above the bottom cover (2); and a pair of female brackets (17a, 17b), coupled to each side of the bottom cover (2) and exposed to the ceiling (1), wherein the pair of female brackets (17a, 17b) are configured to receive at least one fastener (18a, 18b) to connect each side of the bottom cover (2) with a mounting bracket of the pair of mounting brackets (16a, 16b). 9. The enclosure (100) as claimed in claim 1, wherein the bottom cover (2) is defined with a chamfer portion (20) about a connection region with the ceiling (1), to vary contact surface between the ceiling (1) and the bottom cover (2). 10. The enclosure (100) as claimed in claim 1, comprising a sealing assembly (21), connectable to the bottom cover (2), wherein the sealing assembly (21) comprises: a first sealing member (22), provisioned between the bottom cover (2) and the ceiling (1), wherein the first sealing member (22) is configured to provide an impermeable radial flow path from the clean room side of the luminaire assembly (3); and a second sealing member (23), provisioned between the diffuser (4) of the bottom cover (2) and the luminaire assembly (3), wherein a pressure plate (24) is configured to peripherally hold the second sealing member (23) to provide an impermeable axial flow path from the clean room side of the luminaire assembly (3). 11. A luminaire system (200) for a clean room, the system (200) comprising: a plurality of luminaire assemblies, configured to illuminate a clean room, each of the plurality of luminaire assemblies comprising: a printed circuit board (26); and an enclosure (100) comprising:
a bottom cover (2), supporting the luminaire assembly (3), wherein the bottom cover (2) includes a diffuser (4), fixed to a ceiling (1) of the clean room, and exposed to a clean room side of the luminaire assembly (3); and a top cover (6), substantially flush with the ceiling (1) of the clean room and pivotally operable relative to the bottom cover (2), the top cover (6) is exposed to a bay side the clean room, wherein the top cover (6) includes at least one aligning member (8) at a periphery of the top cover (6) and extending towards the bottom cover (2), the at least one aligning member (8) is structured to engage a peripheral portion of at least one of the ceiling (1) and the bottom cover (2), to align the top cover (6) relative to the bottom cover (2). 12. The system (200) as claimed in claim 11, comprises one or more reinforcing members (10), defined on the top cover (6), wherein the one or more reinforcing members (10) enable the top cover (6) to form a pavement in the bay side. 13. The system (200) as claimed in claim 11, comprises actuation unit (11) coupled to the top cover (6), wherein the actuation unit (11) is structured to selectively actuate and deactuate a switch in the bottom cover (2) based on relative position between the top cover (6) and the bottom cover (2), to control operation of the luminaire assembly (3). 14. The system (200) as claimed in claim 11, comprises a hinge mechanism (13), coupled to at least one side of the top cover (6), wherein the hinge mechanism (13) is structured to operatively disengage the top cover (6), when displaced in a defined direction, to allow dislodging of the top cover (6) from the ceiling (1) of the clean room. 15. The system (200) as claimed in claim 11, comprises a dampener (14), disposed between to the top cover (6) and a printed circuit board (26) of the luminaire assembly (3), wherein the dampener (14) is configured to absorb mechanical shocks from the top cover (6) and maintain relative position of the printed circuit board (26). 16. The system (200) as claimed in claim 11, comprises a bracket assembly (15), configured to connect the bottom cover (2) to the ceiling (1) of the clean room, wherein the bracket assembly (15) comprising: a pair of mounting brackets (16a, 16b), rigidly connected to the ceiling (1) and overhanging above the bottom cover (2); and a pair of female brackets (17a, 17b), coupled to each side of the bottom cover (2) and exposed to the ceiling (1), wherein the pair of female brackets (17a, 17b) are configured to receive at least one fastener (18a, 18b) to connect each side of the bottom cover (2) with a mounting bracket of the pair of mounting brackets (16a, 16b). 17. The system (200) as claimed in claim 11, wherein the bottom cover (2) is defined with a chamfer portion (20) about a connection region with the ceiling (1), to vary contact surface between the ceiling (1) and the bottom cover (2). 18. The system (200) as claimed in claim 11, comprising a sealing assembly (21), connectable to the bottom cover (2), wherein the sealing assembly (21) comprises: a first sealing member (22), provisioned between the bottom cover (2) and the ceiling (1), wherein the first sealing member (22) is configured to provide an impermeable radial flow path from the clean room side of the luminaire assembly (3); and a second sealing member (23), provisioned between the diffuser (4) of the bottom cover (2) and the luminaire assembly (3), wherein a pressure plate (24) is configured to peripherally hold the second sealing member (23) to provide an impermeable axial flow path from the clean room side of the luminaire assembly (3).
Dated 13th day of August 2021 Gopinath Arenur Shankararaj OF K & S PARTNERS AGENT FOR THE APPLICANT(S) IN/PA-1852