Patent Publication Number: US-8116004-B2

Title: Reflective light shelf, system and method

Description:
This application claims priority from U.S. Provisional Patent Application No. 61/165,761 filed on Apr. 1, 2009, which is hereby incorporated herein by reference in its entirety. 
    
    
     The subject matter of the present disclosure broadly relates to the art of building structures and, more particularly, to a reflective light shelf and system for projecting exterior illumination into an interior space of a building structure. A method of assembling a reflective light shelf system is also provided. 
     BACKGROUND 
     Reflective light shelves are known to be installed within building structures and are typically secured on or along the interior of windows of a building structure to reflect and/or redirect exterior illumination into an interior space of the building structure. One benefit of installing reflective light shelves is that the exterior illumination entering the building structure through the windows can be reflected a greater distance into the interior space and/or in a different direction than might otherwise occur. 
     Notwithstanding the overall usage and benefits of known reflective light shelves, in some cases known constructions have been found to be difficult and/or time consuming to install. This can undesirably lead to increased costs associated with the use of reflective light shelves. In other cases, known reflective light shelves have been designed that are more easily and/or more quickly installed. Unfortunately, these reflective light shelves, once installed, have, in some cases, been found to be less attractive or otherwise less aesthetically pleasing than may be desired. For example, reflective light shelves that are faster or easier to install can include mounting brackets and/or fasteners that remain exposed and visible to an observer within the building structure. 
     Accordingly, it is believed desirable to develop a reflective light shelf structure, system and method that overcome the foregoing or other disadvantages of known reflective light shelf designs. 
     BRIEF DESCRIPTION 
     One example of a reflective light shelf in accordance with the subject matter of the present disclosure that is adapted for use within an associated building structure adjacent an associated window thereof is provided that includes a first wall and a second wall disposed in spaced relation to the first wall such that a chamber is at least partially defined there between. An inner-core structure is disposed within the chamber between the first and second walls. 
     Another example of a reflective light shelf in accordance with the subject matter of the present disclosure that is adapted for use within an associated building structure adjacent an associated window thereof is provided that includes a first wall and a second wall. The first wall extends longitudinally between opposing first and second ends and laterally between opposing first and second edges, which extend longitudinally along the first wall. The first wall includes an outer surface that is adapted to reflect light into the associated building structure from the associated window. The first wall also includes an inner surface that is disposed opposite the outer surface as well as a first side wall that is disposed along the first edge and a second side wall that is disposed along the second edge. The first and second side walls project in a direction generally away from the outer surface and toward the inner surface. The second wall also extends longitudinally between opposing first and second ends and laterally between opposing first and second edges, which extend longitudinally therealong. The second wall includes an inner surface, an outer surface disposed opposite the inner surface, a first side wall disposed along the first edge and a second side wall disposed along the second edge. The first and second side walls project in a direction generally away from the outer surface and toward the inner surface. The second wall is positioned in spaced relation to the first wall such that the inner surfaces of the first and second walls are facing one another and a chamber is at least partially formed therebetween. An inner-core structure is disposed within the chamber between the inner surfaces of the first and second walls. A first cavity is formed between the first and second walls along the first ends thereof and extends laterally into the reflective light shelf from along the first edges of the first and second walls. A second cavity is formed between the first and second walls along the second ends thereof and extends laterally into the reflective light shelf from along the first edges of the first and second walls. A first support element is at least partially received within the first cavity and includes a first wall portion extending between the first and second walls, a second wall portion projecting longitudinally from the first wall portion along the first wall and a third wall portion projecting longitudinally from the first wall portion along the second wall. A second support element is at least partially received within the second cavity and includes a first wall portion extending between the first and second walls, a second wall portion projecting longitudinally from the first wall portion along the first wall and a third wall portion projecting longitudinally from the first wall portion along the second wall. 
     A further example of a reflective light shelf in accordance with the subject matter of the present disclosure that is adapted for use within an associated building structure adjacent an associated window thereof can include a first wall extending longitudinally between opposing first and second ends that at least partially define a shelf length and extending laterally between opposing first and second edges that at least partially define a shelf width. The first wall can include an inner surface and an outer surface that disposed opposite the inner surface with the outer surface exhibiting a combination of diffuse and spectral reflectivity operative to reflect light received through the associated window into the associated building structure. A second wall can extend longitudinally between opposing first and second ends that at least partially define the shelf length and extending laterally between opposing first and second edges that at least partially define the shelf width. The second wall can include an inner surface and an outer surface that is disposed opposite the inner surface. The second wall can be oriented with respect to the first wall such that the inner surfaces of the first and second walls are facing one another with the first ends disposed adjacent one another forming a first shelf end and the second ends disposed adjacent one another forming a second shelf end. The first and second walls can be positioned in spaced relation to one another such that a shelf height is at least partially defined therebetween and such that a shelf chamber is at least partially formed between the inner surfaces of the first and second walls. A first support element can be received within the shelf chamber and can include a first wall portion extending in a heightwise direction between the first and second walls. The first support element can be oriented in a widthwise direction relative to the first and second walls. The first support element can be disposed along the first shelf end such that a first cavity is formed between the first and second walls along the first shelf end outwardly of the first support element in a lengthwise direction. A second support element can be received within the shelf chamber and can include a first wall portion extending in a heightwise direction between the first and second walls. The second support element can be oriented in a widthwise direction relative to the first and second walls. The second support element can be disposed along the second shelf end such that a second cavity is formed between the first and second walls along the second shelf end outwardly of the second support element in a lengthwise direction. An inner-core structure can be disposed within the shelf chamber between the inner surfaces of the first and second walls. The inner-core structure can terminate adjacent at least a portion of the first and second support elements such that the first and second cavities remain at least partially void of the inner-core structure. 
     A reflective light shelf system in accordance with the subject matter of the present disclosure that is adapted to be supported adjacent an associated window of an associated building structure is provided that includes a reflective light shelf and at least one mounting bracket. The reflective light shelf includes a first wall and second wall spaced from the first wall such that a chamber is at least partially defined therebetween. An inner-core structure is disposed between the first and second walls within at least a portion of the chamber. The at least one mounting bracket is adapted for securement on the associated building structure and receivable within the chamber of the reflective light shelf such that the at least one mounting bracket is visually concealed when said reflective light shelf system is installed on the associated window. 
     A reflective light shelf system in accordance with the subject matter of the present disclosure that is adapted to be supported adjacent an associated window of an associated building structure is provided that includes a reflective light shelf, a first mounting bracket and a second mounting bracket. The reflective light shelf extends lengthwise between opposing first and second ends and extends widthwise between opposing first and second edges. The reflective light shelf includes a first wall and a second wall. The first wall includes an outer surface adapted to reflect light into the associated building structure and an inner surface disposed opposite the outer surface. The second wall includes an inner surface disposed in facing relation to the inner surface of the first wall and an outer surface opposite the inner surface. The second wall is disposed in spaced relation to the first wall such that a shelf height is defined between the outer surfaces of the first and second walls. An inner-core structure is operatively connected between the inner surfaces of the first and second walls. A first cavity is formed along the first end and extends widthwise into the reflective light shelf from along the first edge. A second cavity is formed along the second end and extends widthwise into the reflective light shelf from along the first edge. The first mounting bracket includes a first portion adapted for securement along the associated window and a second portion extending from the first portion in approximately transverse relation thereto. The second mounting bracket includes a first portion adapted for securement along the associated window and a second portion extending from the first portion in approximately transverse relation thereto. The first and second mounting brackets are adapted to be respectively received within the first and second cavities of the reflective light shelf such that the first and second mounting brackets are visually concealed when said reflective light shelf system is installed on the associated window. 
     One example of a method of installing a reflective light shelf system in accordance with the subject matter of the present disclosure can include providing a reflective light shelf extending lengthwise between opposing first and second ends and extending widthwise between opposing first and second edges. The reflective light shelf can include a first wall including an outer surface exhibiting a combination of diffuse and spectral reflectivity adapted to reflect light into the associated building structure and an inner surface disposed opposite the outer surface. A second wall including an inner surface disposed in facing relation to the inner surface of the first wall and an outer surface opposite the inner surface. The second wall can be disposed in spaced relation to the first wall such that a shelf height is defined between the outer surfaces of the first and second walls. An inner-core structure can be operatively connected between the inner surfaces of the first and second walls. A first cavity can be formed along the first end and can extend widthwise into the reflective light shelf from along the first edge. A second cavity can also be formed along the second end and can extend widthwise into the reflective light shelf from along the first edge. The method can also include providing first and second mounting brackets that each include a first portion adapted for securement along an associated window of an associated building structure and a second portion extending from the first portion in approximately transverse relation thereto. The method can further include securing the first and second mounting brackets on the associated building structure along the associated window thereof. The method can also include supporting the reflective light shelf on the first and second mounting brackets such that the first and second mounting brackets are received within respective ones of the first and second cavities and visibly concealed thereby. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an associated building structure having associated windows with examples of reflective light shelf systems in accordance with the subject matter of the present disclosure installed therealong within the associated building structure. 
         FIG. 2  is a side elevation view of one of the reflective light shelf systems installed along an associated window of the associated building structure in  FIG. 1 . 
         FIG. 3  is a cross-sectional side view of a reflective light shelf in accordance with the subject matter of the present disclosure taken from along line  3 - 3  of the reflective light shelf system in  FIG. 1 . 
         FIG. 4  is a cross-sectional side view of an enlarged portion of the reflective light shelf in  FIGS. 1-3  identified as Detail  4  of the reflective light shelf system in  FIG. 2 . 
         FIG. 5  is a cross-sectional top view of the reflective light shelf shown in  FIGS. 3 and 4  taken from along line  5 - 5  in  FIG. 3 . 
         FIG. 6  is a cross-sectional side view of one example of the reflective light shelf system in  FIGS. 1 and 2  illustrating a portion of the reflective light shelf in  FIGS. 3-5  taken from along line  6 - 6  in  FIG. 5  and a mounting bracket securing the reflective light shelf to the associated building structure. 
         FIG. 7  is a cross-sectional end view of the reflective light shelf system in  FIGS. 1 ,  2  and  6  illustrating a portion of the reflective light shelf shown in  FIGS. 3-5  taken from along line  7 - 7  in  FIG. 6  and a mounting bracket securing the reflective light shelf to the associated building structure. 
     
    
    
     DETAILED DESCRIPTION 
     Turning now to the drawings, wherein the showings are for the purpose of illustrating examples of the subject matter of the present disclosure and which are not intended to be limiting,  FIGS. 1 and 2  illustrate a portion of a conventional building structure BLD which can be of any suitable type, kind and/or construction. The building structure includes a first wall WL 1  and a second wall WL 2 . A first window WD 1  is shown installed in the first wall and a second window WD 2  is shown installed in the second wall. First window WD 1  includes a first frame FR 1  with a first or upper pane of glass PG 1  and a second or lower pane of glass PG 2  supported therein. An optional window mullion ML 1  is shown as extending in a generally horizontal direction between the first and second panes of glass and is connected at the opposing ends thereof (not numbered) to first frame FR 1 . 
     Similarly, second window WD 2  includes a second frame FR 2  and a plurality of panes of glass supported therein. Second window WD 2  differs from first window WD 1  in that a window mullion ML 2  extends in a generally vertical direction within second frame FR 2  to separate second window WD 2  into two sections. Each of the two sections is shown as including a first or upper pane of glass PG 1  and a second or lower pane of glass PG 2  with an optional window mullion ML 3  disposed between the first and second panes of glass. Window mullions ML 3 , if provided, can extend in a generally horizontal direction and can be connected at the opposing ends thereof (not numbered) to second frame FR 2  and window mullion ML 2 . 
     Additionally, building structure BLD includes an interior space INT that includes a floor FLR or other bottom wall and a ceiling CLG or other top wall. The space external to the building structure (i.e., the surroundings outside of the building structure) is generally identified throughout the drawings by reference characters EXT. 
       FIGS. 1 and 2  also illustrate a plurality of reflective light shelf systems  100  in accordance with the subject matter of the present disclosure that are supported on or along windows WD 1  and WD 2  of building structure BLD. Reflective light shelf systems  100  are shown as being supported adjacent a window (e.g., first window WD 1  and second window WD 2 ) and include a reflective surface that is adapted to direct light from the exterior of the building into the interior space of the building structure, such as to increase passive lighting within the interior space of the building structure, for example. As an example, natural light (e.g., direct or indirect sunlight) is commonly used to increase passive lighting within a building structure. As is illustrated in  FIG. 2 , natural light, which is represented by arrows NLT, streams through upper pane of glass PG 1  toward reflective light shelf system  100 . Through the use of a reflective light shelf, such as reflective light shelf system  100 , for example, the natural light is reflected off of the reflective thereof and into interior space INT of the building structure. As is represented by arrows RLT in  FIG. 2 , the natural light is redirected upwardly toward ceiling CLG. In this manner, the passive illumination within the interior space of the building structure can be increased. 
     A reflective light shelf in accordance with the subject matter of the present disclosure will preferably include at least one surface having sufficient reflectivity to reflect and/or redirect light from an exterior light source, such as natural light arrows NLT, for example, into an interior space of a building structure, such as is indicated by reflected light arrows RLT, for example. It will be appreciated that the at least one reflective surface can have any suitable surface finish and/or be of any suitable color for providing the aforementioned level of reflectivity. As one example, one or more metallic colors (e.g., silver, gold or copper) could be applied to the surface or could be an exposed surface of the material (e.g., steel, aluminum or copper) from which the reflective light shelf is formed. As another example, one or more non-metallic colors (e.g., white) could be applied to the surface, such as in the form of a paint layer, an epoxy coating or a polymeric film, for example. Additionally, as will be discussed in greater detail hereinafter, a higher gloss finish is generally preferred over a lower gloss finish. In the case of a paint or epoxy covering, a high gloss finish would be preferred instead a semi-gloss finish, and a semi-gloss finish would be preferable instead of a satin or matte finish. 
     As indicated above, in a preferred arrangement, at least one of the surfaces of the reflective light shelf can have a smooth, high gloss or otherwise shiny surface that is capable of generating a reflection that is more spectral than diffuse in nature. And, such a smooth, high gloss or otherwise shiny surface can be provided in any suitable manner, such as through the use of: mechanical finishing techniques (e.g., polishing, burnishing and/or buffing); chemical cleaning, chemical polishing and/or other chemical treatments; coating and/or layering of materials (e.g., anodized or oxide coating, paint, epoxy and/or polymeric film) on or along the surface; or any combination of the foregoing and/or other surface finishing techniques. 
     Generally, one or more of the surfaces of the reflective light shelf will be finished in a manner such that a combination of diffuse and specular reflections are generated thereby. In a preferred arrangement, at least one of the surfaces of the reflective light shelf will exhibit a combination of diffuse and specular reflections in which the proportion of specular reflection (e.g., direct reflection, mirror-like reflection, reflection in a definite direction) is equal to or greater than the corresponding proportion of diffuse reflection (e.g., scattered reflection, reflection in many or all directions). That is, in a preferred embodiment, at least one surface of the reflective light shelf will be sufficiently smooth, glossy, polished or otherwise shiny that the amount of specular reflection that is generated by an external light source illuminating the surface will be equal to or greater than the amount of diffuse reflection that is generated by the at least one surface. 
     One example of a suitable construction for reflective light shelf system  100  is shown in greater detail in  FIGS. 3-7 . Turning, first, to  FIGS. 5 and 6 , reflective light shelf system  100  includes a reflective light shelf  102  and at least one mounting bracket adapted to secure the reflective light shelf to a suitable structure or feature of the window or wall of the building structure. In the present exemplary arrangement, first and second mounting brackets  104  and  106  are shown and described herein as being secured on or along a window frame (e.g., one of frames FR 1  and FR 2 ) or one of the window mullions (e.g., one of mullions ML 1 , ML 2  and ML 3 ). It will be appreciated, however, that any other suitable component or feature of the building structure could alternately be used. 
     With reference, now, to  FIG. 5 , reflective light shelf  102  extends longitudinally between a first end  108  and a second end  110  to thereby define a nominal length of the reflective light shelf, which nominal length is represented by reference dimension LTH. Reflective light shelf  102  also includes first and second longitudinally-extending edges  112  and  114  that are spaced laterally from one another to thereby define a nominal width of the reflective light shelf, which nominal width is represented by reference dimension WTH. It will be appreciated that reflective light shelf  102  can be of any suitable length and/or width, such as a length within a range of from approximately 3 feet to approximately 15 feet, for example, and a width within a range from approximately 1 foot to approximately 4 feet, for example. 
     In the exemplary arrangement shown, reflective light shelf  102  includes a first or upper wall  116  and a second or lower wall  118  that is spaced from the first wall to thereby define a nominal height of the reflective light shelf, which nominal height is represented in  FIG. 3  by reference dimension HOT. First wall  116  includes an outer surface  120  and an opposing inner surface  122 . Similarly, second wall  118  includes an outer surface  124  and an opposing inner surface  126 . The first and second walls are oriented relative to one another such that inner surfaces  122  and  126  are facing one another. Additionally, the first and second walls are positioned in spaced relation to one another such that a shelf cavity or space  128  is at least partially defined therebetween. 
     In the exemplary embodiment shown in  FIGS. 3-7 , first wall  116  also includes optional first and second end wall portions  130  and  132  and optional first and second side wall portions  134  and  136 . The end wall portions and/or side wall portions, if provided, can project in a generally heightwise direction from the first wall, such as in a direction away from outer surface  120  and toward inner surface  122 , for example. Similarly, second wall  118  can optionally include first and second end wall portions  138  and  140  and/or first and second side wall portions  142  and  144 . These end wall portions and/or side wall portions, if provided, can also project in a generally heightwise direction from the second wall, such as in a direction away from outer surface  124  and toward inner surface  126 , for example. 
     It will be appreciated that any such end wall portions and/or side wall portions, if included, will act to further define shelf cavity  128  and can also operate as structural features for mounting additional elements and/or components that may be included on or along reflective light shelf  102 . As one example, reflective light shelf assembly can, optionally, include a cover wall  146 , such as may be included to improve the cosmetic appearance of reflective light shelf  102  or for other purposes. It will be appreciated that cover wall  146  can be secured on or otherwise attached to reflective light shelf  102  in any suitable manner. For example, a plurality of mounting clips  148  can be positioned in spaced relation to one another along one or more of the ends (e.g., ends  108  and  110 ) and/or edges (e.g., edges  112  and  114 ) of the reflective light shelf. As shown in  FIG. 4 , mounting clip is disposed along side wall portions  136  and  144  of first and second walls  116  and  118 , respectively, and can be secured thereto in any suitable manner, such as by using a fastener  150  threadably secured to side wall portions  136  and  144 , for example. Additionally, it will be appreciated that a cover wall, such as cover wall  146 , for example, if provided, can be of any suitable shape, size and/or configuration and that the cover wall shown and described herein is merely exemplary. 
     Reflective light shelf  102  also includes an inner-core structure disposed within at least a portion of shelf cavity  128 . The inner-core structure extends in a generally heightwise direction between first wall  116  and second wall  118  and can be in abutting engagement with either or both of the first and second walls. In a preferred arrangement, the inner-core structure is secured on or along at least one of first and second walls  116  and  118  such that a composite beam-like structure is formed thereby. It will be appreciated that the inner-core structure can be of any suitable type, kind, configuration and/or construction. Additionally, it will be appreciated that the inner-core structure can be formed from any suitable material or combination of materials. As one example, the inner-core structure could be at least partially formed from a metal material (e.g., an aluminum alloy honeycomb) that is laminated, adhered, or otherwise attached to at least one of the first and second walls. As another example, the inner-core structure could be at least partially formed from a polymeric material (e.g., a rigid thermoplastic honeycomb or a rigid thermoset foam) that is laminated, adhered or otherwise attached to at least one of the first and second walls. As yet another example, the inner-core structure could be at least partially formed from a composite of fibrous material coated with a polymeric material (e.g., a phenolic resin impregnated paper honeycomb) that is laminated, adhered or otherwise attached to at least one of the first and second walls. 
     In  FIGS. 3-7 , the inner-core structure discussed above is generally represented by item number  152  and is shown in  FIG. 5  as being of a honeycomb configuration with a plurality of inner-core elements  154  that at least partially define a plurality of cavities or cells  156 . It will be appreciated that the inner-core elements and the corresponding cells that are at least partially defined thereby can be of any suitable size, shape, thickness, alignment, configuration and/or arrangement. Additionally, it will be appreciated that such characteristics are expected to vary from application-to-application as well as in relation to the materials and/or construction of the inner-core structure, such as has been discussed above, for example. Furthermore, it will be appreciated that first and second walls  116  and  118  can be formed from any suitable material or combination of materials, such as an aluminum or steel alloy, for example, and that such material choice may also influence the materials, construction and/or other characteristics of the inner-core structure, such as has been discussed above. 
     Returning briefly to  FIGS. 1 and 2 , it will be appreciated that reflective light shelf assemblies in accordance with the subject matter of the present disclosure, such as reflective light shelf assembly  100 , for example, as well as conventional reflective light shelf constructions are preferably installed at a height from floor FLR that would be suitable for reflecting and/or redirecting light toward ceiling CLG of the building structure. In many cases, the installed height, which is represented in  FIG. 1  by reference dimension HT 1 , will be above eye-level form most, if not all, of the occupants of the interior space. As such, it is anticipated that reflective light shelf assembly  100  will typically be viewed from below, as is indicated in  FIGS. 1 and 2  by viewpoint arrow VPT. Accordingly, it is believed desirable for any fasteners or other mounting components that are expected to remain visible after installation to be visible from above the reflective light shelf assembly rather than from below the assembly. 
     Returning, now, to  FIG. 5 , side wall portions  134  and  142  extend longitudinally along first edge  112  between first and second ends  108  and  110 . However, side wall portions  134  and  142  respectively terminate prior to reaching end wall portions  130  and  138  at first end  108  and end wall portions  132  and  140  at second end  110  such that openings  158  and  160  are formed along the first edge and provide access to shelf cavity  128 . In a preferred arrangement, openings  158  and  160  are preferably of suitable dimension to respectively receive first and second mounting brackets  104  and  106  within the shelf cavity. In this manner, reflective light shelf  102  can be capable of concealing substantially all or mounting brackets  104  and  106 , such as may be desirable for improving the aesthetic appearance of the reflective light shelf assembly, for example. 
     Optionally, a reflective light shelf in accordance with the subject matter of the present disclosure can include one or more support elements received within the reflective light shelf that act to buttress the reflective light shelf in an installed condition. It will be appreciated that such one or more support elements can be of any suitable type, kind, configuration and/or construction. For example, reflective light shelf  102  is shown in  FIG. 5-7  as including a first support element  162  disposed within shelf cavity  128  along first end  108  of the reflective light shelf and a second support element  164  disposed within shelf cavity  128  along second end  110  of the reflective light shelf. First and second support elements  162  and  164  are shown as being substantially similar to one another and including a first element wall  166  that extends heightwise between first and second walls  116  and  118 . The first and second support elements also include a second element wall  168  that projects longitudinally from the first element wall and is disposed adjacent first wall  116 . The first and second support elements further include a third element wall  170  that also project longitudinally from the first element wall but in spaced relation to the second element wall adjacent second wall  118 . As shown in  FIG. 7 , third element wall  170  is spaced a distance from second element wall  168 , as is represented by dimension D 1 . The first and second support elements can be secured on or along one of more of first and second walls  116  and  118  in any suitable manner. In a preferred arrangement, the first and second support elements are secured to at least one of the first and second walls using a connection or joint that is not visible from along the exterior of the reflective light shelf, such as, for example, by using a flowed-material joint (e.g., a weld, a brazed joint, a soldered joint or an adhesive connection). 
     Mounting brackets  104  and  106  can be of any suitable type, kind, configuration and/or construction that is suitable for securement on or along an associated window, wall or other building structure. In the exemplary arrangement shown, mounting brackets  104  and  106  are substantially similar to one another and include a first bracket wall portion  172  that is suitable for abuttingly engaging an associated window, wall or other building structure, such as window frame FR 2  as shown in  FIGS. 6 and 7 , for example. It will be appreciated that mounting brackets  104  and  106  can be secured or otherwise attached on or along the associated window, wall or other building structure in any suitable manner, such as by using one or more fasteners  174  that extend through a suitable opening (not numbered) in the mounting brackets to connectably engage window frame FR 2 , for example. 
     Mounting brackets  104  and  106  are also shown as including a second bracket wall portion  176  that projects in a generally widthwise direction from first bracket wall portion  172  and is adapted abuttingly engage reflective light shelf  102  to support the same on the associated window, wall or other building structure. Reflective light shelf  102  can be secured on or along mounting brackets  104  and  106  in any suitable manner. For example, one or more fasteners  178  can be used that extend through at least a portion of the reflective light shelf, preferably from along first wall  116  thereof, and connectably engage second bracket wall portion  176 . 
     In a preferred embodiment, first and second support elements  162  and  164  are provided within shelf cavity  128 , such as has been previously described. In such case, first bracket wall portion  172  preferably extends a distance along the associated window, wall or other building structure, as is represented by reference dimension D 2  in  FIG. 7 , that is less than the distance D 1  between second and third element walls  168  and  170  of the first and second support elements. In this manner, mounting brackets  104  and  106  can be substantially entirely received within reflective light shelf  102  to thereby substantially conceal the mounting brackets. Additionally, fasteners  178  are installed from along first wall  116  such that the exposed portions thereof (e.g., the heads of the fasteners) are not visible from below reflective light shelf assembly  100 . 
     As used herein with reference to certain elements, components and/or structures (e.g., “first end” and “second end”), numerical ordinals merely denote different singles of a plurality and do not imply any order or sequence unless specifically defined by the claim language. 
     While the subject matter of the present disclosure has been described with reference to the foregoing embodiments and considerable emphasis has been placed herein on the structures and structural interrelationships between the component parts of the embodiments disclosed, it will be appreciated that other embodiments can be made and that many changes can be made in the embodiments illustrated and described without departing from the principles of the subject matter of the present disclosure. Obviously, modifications and alterations will occur to others upon reading and understanding the preceding detailed description. Accordingly, it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative and not as a limitation. As such, it is intended that the subject matter of the present disclosure be construed as including all such modifications and alterations insofar as they come within the scope of the appended claims and any equivalents thereof.