RELA TED APPLICATIONS

11 This appl ication is a coft«B«atk>n-in~part of and claims the benefit of and priority to U.S. on -provisional Utility Patent Application Serial No. 15/335,401 . filed October 26, 2016, which claims the benefit of and priority to U.S. Provisional Patent Application Serial. No. 62/320,517, filed April , 2016, both enti tled, ""Adaptive LED Cove Lighting System," ^' the contents of both of which are incorporated by reference herein in their entireties.

FIELD OF THE DISCLOSURE 2 J The subject disclosure relates to LED electric lighting fixtures, and more particularly to LED light fixture apparatus configured to project light from, a cove or other architectural feature into an adjacent room space.

DESCRIPTION OF RELATED ART

|3| Various LED electric light fixtures have ^' been constructed in the past, for example, such as those disclosed in U.S. Patents 7,726,840 and 8,864,347, both assigned to Tempo industries. LLC, SUMMARY

|4| An illustrative LED cove light system may comprise a wall piece mounted to a back surface of a cove and having a lop edge which is at the same height as a -top surface of a front wall of the cove. A light fixture component is removably attachable at an angle to the wall piece and carries one or more LEDs positioned to project light fr m the cove out into an adjacent space of a room. In an illustrative embodiment, the one or more LEDs are mounted near a top edge of the light, fixture component but at or beneath the level of the top surface of the front wall of the cove, f 5| Illustrative embodiments further provide a method of illuminating a surface comprising constructing a wail piece and configuring the wail piece to be monntable to a cove wall surface perpendicular t a surface to be Illuminated and configuring a light fixture component and the wall piece to he to attachable together such that one or more LEDs in the light fi ture component are positioned at. an angle selected to project light from the LEDs on the surface to be illuminated. The wall piece is then attached to a wa!L and the light fixture component is attached to the wall piece such that each of the one or more LEDs is spaced at a selected distance from the surface to be illuminated. Illustrative methods further contemplate attaching the wail piece to a structural ^• surface of predictable integrity so thai planned light distributions are not al ered during the construction phase of building projects. Overall an end. user is assured a predictable, controlled lighting effect.

DESCRIPTION OF THE DRAWINGS

|6| FlG, I is a schematic side view of an LED cove light system according to .an illustrative embodiment;

|7| FiG. 2 is a schematic diagram illustrating light distribution patterns according to an illustrative embodiment of the cove light system of PIG. Ϊ ; (8| FIG. 3 is ah exploded perspective view of illustrative light fixture modules tor implementing an illustrative system according to FiG. 1 ;

[9| FiG- 4 is an exploded perspective view illustrating LE placement according to one illustrative embodiment;

11 9] FIG. § is a to perspective view of the modules ^; of FiG. 3 in an assembled state;

{11 } FiG. 6 is a side sectional view illustrating a first step in a procedure fo

attachment/installation of a light fixture module to a wall piece according to an illustrative embodiment:

112] FiG. ? is a side sectional view illustrating a second step m the procedure of FsG. 6; f 13] FiG, 8 is side sectional view illustrating a third step in the procedure of FKS. 6;

11.41 FiG. 9 is a schematic diagram illustrating a light distribution pattern achieved according to illustrative embodiments;

(15] FiG. .10 is a partial perspective view further illustraiing apparatus for interconnecting adjacent light fixture modules according to an illustrative embodiment;

116f FiC. 1 1 is an exploded perspective view of a second illustrative light fixture em bod intent; 1 7] FIG. 12 is an enlarged view of a portion of the light fixture embodiment of FiG .1 1 ; 11 8] FiG, 13 is .a side sectional view of the embodiment of Flo, 1 1 in an assembled state; f !9f Fie, 14 is a side view of the embodiment of FIG. 1 1 in an assembled, state;

[20f 15 is a second enlarged view of a portion of the embodiment of FiG. .1 1.

|2I } FfG. 6 is a schematic diagram Ulustradng a tall wai! wash application of an illustrative embodiment;

{22 FiG. I ? is a schematic diagram illustrating a dual ceiling graze application of an illustrative embodiment;

\23\ F G. 18 te » schematic diagram illustrating a single ceiling graze application of an illustrative embodiment;

|24| FIG. 19 is a schematic diagram illustrating an indirect ceiling cove application of an illustrative embodiment: and

|25| FlG, 20 is a schematic diagram, illustrating a wall wash application of an illustrative embodiment

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

|26] An illustrative embodiment of an LED cove light system I I is shown in FiG. 1. in particular, FIG. 1 illustrates a cove 13 having a back wall 15, a front wall .19, and a bottom 17, which, in the illustrative embodiment, form .a channel 20 of rectangular cross-section, in illustrative embodiments the front wall .19, may be, for example, 2 to 6 Inches high. 27| In the illustrative embodiment of FKL I , a cove light fixture 2.1 is attached to the back wall 1 5, The illustrative cove light fixture 21 includes a wall piece or mounting track 22 and an LED fixture component 23, which carries one of more LEDs, LED modules, or LED lighting devices, e.g. 25. In: an illustrative embod ment h to edge 27 of the wall piece 22 lies at the same height as die top edge 29 of the front wail 19 of the cove 13, In some embodiments, the wall piece 22 may be constructed of thermally conductive plastic or a composite polycarbonate. 2SJ In an. illustrative embodiment, the LED light fixture component 23 is constructed to clip on to the wall piece 22 at a predetermined fixed angle of, for example, 20 degrees to the horizontal, and the one or more LEDs 25 are positioned as high as possible toward the top edges 27, 29, In one embodiment, adjacent fixture units are shipped clipped together and include a length adjustment feature, which allows the overall, length of a number of interconnected u nits to be adjusted,

|29[ in m illustrative embodiment, each LED light module 23 directs LED-generated light through a respective lens 28 (FIG, 3). As know in the art, in various embodiments, lenses 28 may be used to tailor the light outpu pattern of the LEDs 25 in a desired manner. n various embodiments, lenses 28 may also protect the LEDs 25 and/or assist in sealing the modules 23, 24.

130] in illustrative embodiments, the system is configured to optimize the distribution of available light in a pattern 32 such as illustrated in. FlG. 2. in such, systems, optics may be used to assist in..projecting light from the cove 1 3 out into the room 31 to contribute to the useable ambient light in the space, to provide a more pleasing effect to the eye, to eliminate the possibility of glare, and to assist in meeting modem energy codes and requirements (e, g. ASHRA.E 90,1 } requiring a certain power density (W sq ft) that can be attributed to lighting. Optics may be employed, for example, to shift the normal f ight distribution pattern 30 to a more desirable distribution, e.g. 32, In illustrative embodiments, the light distribution may varied by changes in the lens 28 or the addition of a reflective surface positioned below the LEDs 25 and attached to the printed circuit board 47,

|31] An illustrative embodiment of a pair of adjacent, light fix ture modules 23. 24 of an illustrative system is shown in FIG, 3, The first module 23 includes base component 40, left and right shield components 43, 53, a module top 45, a printed circuit board (P B) 47, and a dome lens 28, The second module 24 includes a power through base component 50, left and right shields 51, S3, a module top 45, a PCB 47 and a dome lens 28, The respective module tops 45 close the respective base components 40. 50 and receive and mount the P.CB's 47. The respective left and right shields 43, 53 cover holes in the bottom of base component 40 in order to he compliant with U,L. fisting requirements for electrical safety since line voltage wires pass through the cavity formed by components 40 and 45 and attach to the input PCB A 73,

|32| The ^' left and right light fixture modules 23, 24 are connected together by an

interconnection assembly which enable the modules 23, 24 to move linearly towards and away from each other to allow the distance between the modules 23, 24 to be adjusted. FsG, 3 illustrates one embodiment of such an interconnection . assembly, which includes an extension-redaction slide component 63 , an extension retaining clip 63, and a wireway cover 67, These components- are further illustrated in FIG. 10; Embodiments of an interconnection assembly enabling linear movement of adjacent modules are also taught in U,S, Patent Publication 201 /0307438, published October 16, 2 14, which Patent Publication- is incorporated by reference herein in its entirety.

[331 A.C, power is introduced into the first module 23 by a male 3-pin connector assembly S3, which plugs into an opening 56 in the base 40, A.C power may then exit the second base 50 via a female end cap 3-pin connector 57, which may cooperate with three female receptacles 59.. Power is supplied to each of two female in-line connector assemblies 72 and from there to respective A.C, power board assemblies 73. The power board assemblies 7.3 supply conditioned A.C. power to the respective PCB's. 47 via respective 4-pin by two- row connectors 75. Mate power pins 79 provide the return from the PCB's 47 to the A.C. wires 71 via the respective connectors 72. The A.C. power feed and conditioning circuitry in the illustrative embodiments may he constructed as disclosed in U.S. patent application serial no. 14/941 ,476, filed November 13, 2015, and entitled "Compact A.C. Powered LED Light Fixture ^" , which application is incorporated by reference herein in its entirety. {34| FIG, 4 illustrates a circuit board 47 and associated compon nts in more detail, In the illustrative embodiment of FsG> 4, the LEDs 25 are arranged linearly along an upper edge of the board 47 and space equally apart, in one embodiment, the LEDs 25 may he ieliia 75? type LEDs, 0.5 Watts. This positioning of the LEDs 25 assists in obtaining various desired light distribution patterns by placing the LEDs 25 near or at the height level of the front cove wall . 9 (!¾;, 1). in one embodiment, the LEDs 25 may be positioned one half inch below the top edge 29 of the cove wall 19. j _. 35] FIGS. 6-8 show an Illustrative embodiment of an. interconnection mechanism for joining a wall piece 22 and a light fixture module, e.g. 23 , As seen in FlG. 6, the wall piece 22 has a central channel 81 of generally rectangular cross-section having an open entry- way 83. The bottom surface 85 of the light fixture rnodule 23 is cattiiJevered to have linear lower and upper segments 87, _. 8 which meet an obtuse angle "A." A latch member 1 is attached to the uppe segment 89 and has a leg 93 and a foot 95. In one embodiment, the channel S ^' t runs the entire length of the wall piece 22, and the foot 95 is positioned at two locations on the the light fixture module 23. This need not he the case in other embodiments,

[36| As illustrated in FIGS. 6-8, the latch member 91 , channel Si and entry way 83 are so shaped and dimensioned that the upper end 99 of the foot 95 may be inserted into the uppti end of the channel 81 , which enables; the lower end 97 of the toot 95 to swing into the channel 81 , as indicated by arrow 101 in F S. 7, Once in die channel 81 , the foot 95 may he dropped down into the interconnected or attached position shown in Fso. 8, In this position, the LED 25 is disposed at a selected angle, for example, 20 degrees to the horizontal, as discussed above. The eantilevered bottom surface on the light fixture module 23 facilitates this interconnection mechanism. In this manner, a tool-less interconnection and installation of the light fixture module 23 and the wall piece 22 is achieved.

|37j FiG. 9 illustrates a lighting pattern achievable according to illustrative embodiments in a room with vertical walls 401 , 405 lying perpendicular to a ceiling 403. The vertical walls 401 , 405 meet with the ceiling 403 at respective edges 404, 41 . The vertical cove back wal l 15 lies against the- vertical wall 401. f 38] In Fig. 9, (he Candeia curve of maximum intensity 400 forms about a line 402 perpendicular to the surface of the circuit board 41 carrying the LEDs 25; however those skilled in the art will appreciate that this maximum intensity direction can be altered by the use of optics. In connection w sh FIG. 9, 85% efficacy is the ratio of the "useful" light which illuminates a desired surface (i.e. visible to the observer} (o that of the light emitted from (he lu inai e (some of which is lost in .the ens 28), The terms low, medium and high candle power are ed qualitatively because the brightness on the relevant surface (i.e. ft.-cd goes as the inverse of the distance .squared. Thus., to 'throw" light further and achieve the same ft.-cd, one needs to start with higher candle power, as would be appreciated by those skilled in the art,

|39J To elaborate, the -fundamental of uniform lighting are primarily based on (he ratio of intensity in the direction from the source to the task. A source that aimed directly at a task is easily expressed as the Candeia (Candlepower) divided, by the distance to the task squared, ί€ρ/0 2). When the task is not directly li from the source, a cosine factor of the angle along ith the distance to the task determines the foot-candles and therefore the uniformity

(Cp D ^A 2*cos .). To obtain perfect uniformity, the intensity (Candeia) from the source to the outer reaches of (he (ask must be substantially higher than the intensity toward the closest area of the task. Essentially, the light toward the farthest area needs to be ten times that of the closest area with the mid-range blending from low to high in order to achieve good uniformity. The human eye can notice a lighting ratio of approximately 3: 1, therefore, good uniformity with no shadows or hot spots would be considered outstanding,

|40J in embodiments configured, for example, according to Fig, 9, a single luminous ceiling plane can be achieved, A system which delivers 85% efficacy from the cove can provide the primary light in the space, entirely eliminating the need for down!ights, typically provided by downhght "cans. ^" nd resulting in tremendous savings m construction costs in various applications. Performance ma be enhanced -further in some embodiments by employing high light reflectance value (LR greater, than 70) paint or other finish on a ceiling or other surface. An 85% efficacy rating can be contrasted to fluorescent strips Where 40% of die light exits the cove and to prior LED linear fixtures where 60% of the fight exits the cove.

1411 A second Illustrative embodiment of a pair o ^' adjacent light fixture wireway modules 123, 124 of an illustrative system is shown in FtG.1 1 . The first, light fixture wireway module 123 ^• includes a first base component 140, a heat sink 1 5, a printed circuit hoard (PCB) 147, and a lens 127. The second light fixture wireway module 124 includes a second base component 150 and a lens 127. The second light fixture wireway module 1.24 also, includes a heat sink and a PCB, which may be constructed and positioned identically to heat sink 145 and PCB .147, but which are not shown for purposes of clarity of illustration. The respective heat sinks, e. . 145, close the respective first and second wireway module components 140, 150 and receive and mount the PCB's 147.

(42} in an illustrative embodiment, the heat sinks ^' , e.g. 1.45, comprise generally rectangular trays, which snugly receive the PCB's, e.g. 147. The PCB 1.47 may be attached to the trays, for example, mechanical fastener .200, 207, or in other embodiments by thermally conductive adhesive tape. In illustrative embodiments, the base component 1 0 comprises a power input base and the base component .150 comprises a power output base. The PCB 147 may comprise an LED hoard mounting one or more LEDs. In one embodiment, the PCB 14? may mount twelve LEDs in. a row, each of which collectively receive up to 10 watts- of power at 120 volts A.C.

|43] Further in FlG. 11 , a first captive panel screw 200 inserts through holes 20 h 203, and 204, then through a retainer ring 205, which holds screw 200 captive upon removal of the heat sink 145 from the base 140, and finally threads, into a hole 206 in a top surface of the -first base component 1 0. Similarly, a second captive panel screw 207 inserts through holes 208, 209, 21.0, then through a retainer ring 21.1 and finally threads into a hole 2.1 2 in a boss 21 formed on an inner side surface of the first base component 140. |44| Further in an illustrative embodiment, each lens 127 has & fiat portion and an arcuate portion 148 (FKhl 3>. in the illustrative embodime t the arcuate portion 148 has a constant radius so as to avoid sharp edges which would generate non-un fomii n the distributed light, i.e.

artifacts or a "prism effect/ ¹ In one embodiment, the arcuaie portion 1 8 has no "o tic" effect on the fight passing through it, hut in other embodiments could provide an optic-effect, for example, to generate a primary beam like that shown in FiG. 9, In. typical embodiments, the thickness of the lens I 7 is determined by the selected lens material and ILL. requirements. 45| The illustrative embodiment of Fig. 1 1 further includes a reflector component 1 9, which ma be made of, for example, metal or a reflective coated plastic, a one embodiment _* the reflector 149 may have a. parabolic contour. As may be appreciated from Fig. 3 , he reflector component 149 is positioned beneath the LEDs 125 so as to redirect light from the LEDs 125 in an upward direction, thereby assisting in reflecting more useful light out of the fixture 123.

|46| in one embodiment, the left and. right light fixture modules 123, 124 are connected together by an interconnection assembly which enable the modules 123, 124 to move linearly towards and away from each other to allow the distance between the modules 123. 124 to he adjusted, while at the same time meeting safely requirements for shielding a line voltage cable 220 as it passes between the respective base components 1 0, 1 50,

[47j F S.15 illustrates one embodiment of such an interconnection assembly, which includes a wire transfer base component 163, a wire transfer cover 165 and a clip-on..spacer 167. In one embodiment, the ridges, .e.g. 1 62, on each outer side of the wire transfer base 1 63 ride in complementary slots formed on the inner sides of the base components 1 .0, 150, allowing the wire transfer base 1 63 to slide in and out with respect to the base components 1 0, I SO. to thereby vary the distance between the respective base components 1 0,1 SO. Bosses, e.g. 164, on the outside of the wire transfer cover 1.65 snap into oppositely disposed holes 166 in the wire transfer base 1 63 , The wi ^' re ay cover 167 snaps into place and holds the base components 140, .1 50 a fixed distance apart, for example, lor shipping purposes.. [48] in various embodiments, the wireway cover 167 may be removed to permit the distance between the base components 140, 150 to be decreased, after which the base components 1 0, 150 may be screwed or otherwise fastened to an adjacent surface, to fix them into place at the selected separation distance. Thus, illustrative, embodiments provide, a linear collapsing feature, which can assist in accommodating shorter than expected wall lengths.. Embodiments of an interconnection assembly enabling linear movement of adjacent modules are also taught in U.S. Patent Publication 2014/0307438, published October 16, 201 , which Patent Publication is incorporated by reference herein n its entirety. ^'

\49\ With reference to FIG. 1 1 , A>€< power is introduced into the first light fixture module 123 by a male 3-pin connector 155. The electrical cable 159 which exits the connector 155 is attached by a cable clamp 156 to the power input. ^' base 140 and then is clamped by and electrically connected to an electrical connector 1 72 ,

}5Θ] A.C. power exits the power output base 150 via a female 3-pin connector 15? whose cable 161 electrically interconnects with a second electrical connector 1 72 and is clamped in position by a cable clamp 158. In various embodiments, the electrical, connectors 172 may be fabricated of first and second hal es arranged to pierce the insulation of the electrical cables 159, 161, for example, as illustrated in U.S. Patent 9,458,995, incorporated by reference ^' herein.

\ 51 J In one .illustrative embodiment the electrical connectors 172 are connected to A.C. power supply and conditioning circuitry lik that illustrated in Figure I where power is supplied to each of two female -in-line connector assemblies 72 and from there to respective A.C. power board assemblies 73. The power board assemblies 73 supply conditioned A.C, power to the respective PCBs 147 via respective 4-pin by two-row connectors 75, Male power pins 79 provide the return from the PCB"s 147 to the A.C, wires 71 via the respecti e connectors 72. The A.C. power feed and conditioning circuitry may be constructed as disclosed in U.S. Patent Application Serial No, 14/9 1 ,476, filed November 1 3, 2015, and entitled. "Compact A.C. Powered LED Light Fixture," which application is incorporated by reference herein in its entirety. [S2j fa the- illustrative embodiment of Ffo. 1 I , the LEDs. 325 are. arranged linearly along a upper edge 1 8 of the board 14? and spaced e ually apart. In one embodiment, the LEDs 125 may he Nichia 757 type LEDs, O.SWatts. This positioning of the- LEDs 125 assists n obtaining various desired light distribution patterns, for example, by placing the LEDs 125 near or at the height level of a cove wall, such as the cove wall 19 of PIG. 1. In one embodiment, the LEDs 125 may he positioned one-half inch below the top edge 29 of the cove wall 19.

1531 Figure 1 3 shows an illustrative embodiment of an interconnection mechanism for interconnecting a wall moun hanger or wall piece 122 with a light fixture module, e.g. 123. As seen in iG. 13, the vertically disposed wall piece 122 has a from surface 1. S3, which forms Into a. bottom hook portion 185, A projection 86 from the side of the wall piece 122 further defines a horizontally running groove 88. A bottom surface 184 of the light fixture module 123 is shaped, to have linear lower and upper segments 1 87, 1.89 which meet an obtuse angle "ΑΙ .' ^* A lip 191 is formed on the upper segment 189 and fits into the groove 188, In one embodiment, the groove 188 runs the entire length of the wall piece 1 2, and the lip 19-1 runs the entire length of the light fixture module 123. In one embodiment first and second hooks 1 3, 195 are formed on the lower segment 187 (FtG. 1 } and interlock or engage with the bottom hook 185 of the w ll piece 1 22.

1541 in one embodiment, the LEDs 1 5 are disposed at an angle A2 of 20 degrees to the vertical, and the obtuse angle A.I is 1 80-20 - 160 degrees. Various other LED disposition angles A2, for example, such as 10 degrees, may be selected in other embodiments. in one embodiment, the LEDs 125 are preferably placed as high as possible towards the top edge 152 of the PCS 147, fa various embodiments, the closest the LEDs 125 may be placed to the top edge 1 2 of the PCB 1 ? is 30 thousandths of. an inch due to various design considerations. Thus, according to illustrative embodiments, the proper LED angle is automatically achieved upon installation. f _. SSf n some embodiments, it is also desirable to mount the LEDs 125 as close as possible to a., vertical wall to which the wall piece 122 is attached and as high as possible without exposing the LEDs 125 to view when looking at a vertical wall to which, the wall piece 122 is attached along a line of sight which is perpendicular to the vertical wall hi one illustrative embodiment, the dimensions in inches in FiO. i 3 may be: d l ^ 1 .1 1 . d2 ~ 0.5.1 , d;> ~ 0.4 ! , d4 - 0.20, dS - 0.43, d6 ^::: 1 ,91 , -and d7 ^~ 0.12. These dimensions may of c urse vary in various applications and embodiments,

156) In the illustrative embodiment of FIG. 13, the cooperating parts are so shaped and dimensioned that the upper lip 191 may be inserted i to the groove 188. which enables the hook 193 on the li ht fixture module 123 to snap into or otherwise come into engagement with the bottom hook 185 of the wall piece 122 so as to lock or retain the light fixture module 123 in a predetermined fixed position with respect to the wall mount, hanger 122- In this position, the LEDs 125 are disposed at the selected angle, for example, 20 degrees to the horizontal, as discussed abo ve. In this manner, a tool- less interconnection and installation of the light fixture module 123 with respect to the wall piece 122 is achieved.

157] According to illustrative embodiments, two principles may be applied: (a) place the LEDs as high as possible in a cove (low loss, optimum light output) and (b) attach the wall piece to a wall or other surface which is a predictable structural surface for fixture mounting purposes. A predictable surface is one which an architect or designer can anticipate in advance will not be subject to changes during the construction phase which could disturb the desired lighting effect. For example, mounting techniques which propose to mount a cove lighting fixture on the floor or bottom surface of a ceiling cove can be unpredictable because the manner of construction may result in unexpected changes in dimensions or a ceding, cove bottom which is open, exposing studs and gaps between them.

|S8) FIGS. 16-20 illustrate the utility and advantages of illustrative embodiments in various applications. In the illustrative examples of FIGS. 16-20. a light fixture which employs a lens like that in FiO. 1 3 is used, as opposed to one with optics that would create a .narrower beam such as illustrated in FiO. 9. Of course narrow beam optics could be used in other embodiments. [59f F ^' SG. 1 illustrates a tail wall wash embodiment where a light fixture 31 1 according to illustrative embodiments is mounted in the horizontal bottom 313 of .a cove and positioned to throw light en a vertical wall 313. The LEDs 317 of the fixture 31 1 are positioned at a distance ~ F from the vertical wall 315. Since this distance "d" can remain the same regardless of the width "w" of the cove bottom 31 . reliable pre-posiiioning of the light fixture 31.1. without the need for post-installation adjustment is facilitated.

160f FiG. I ? illustrates a dual ceiling graze embodiment with respective fixtures 1 1, disposed on respective side walls 322, 324, above respective horizontal cove walls 321 , 323 to Illuminate respective ceiling surfaces 323, 327. Such an embodiment might be used, for example, down the middle of the ceiling of a .room.

[61 J FSG, 18 show a ceiling graze embodiment, where a single fixture 1 I ts attached to the vertical side wall 329 of a cove above a horizontal bottom, cove surface 3 1 and positioned to illuminate a horizontal ceiling surface 333. Again, the distance "w" can be varied, while the distance "d ^" ' from the LEDs 317 to the ceding 333 can be held constant thereby maintaining the desired light distribution, while avoiding post- installation adjustment, of the position of the fixture.

|62| FiG. 19 illustrates a fixture mounted on a vertical stdewall 335 of a cove to provide indirect lighting of a horizontal ceiling _. 337. Again, the width ^* 'w ^** of the cove may vary or the bottom of the cove taay be open or irregular, but the desired illumination pattern can still be achieved with the LEDs again spaced a selected fixed distance from the ceiling 337, while avoiding the need for post-installation adjustment. f 63] Finally, FiG. 20 i Illustrates, a wall wash embodiment where a fixture 311 is mounted in a horizontal ceiling 341 adjacent a vertical cove wall 343, Again, the distance between the vertical cove wall 34 and the wail 345 being illuminated may vary while the distance '3f between the LEDs and the wall 345 can be maintained the same so as to result in. the desired pre-designed illumination pattern. f 64] From the foregoing, those killed in the art will appreciate that, various adaptations and modifications of the just described illustrative embodiments can be configured without departing from the scope and spirit of the invention. Therefore, it is to be understood that, within the scope of the appended claims, the invention may be practiced other than, as specifically described herein.

Further embodiments are given in the following paragraphs:

1. An LED cove light system comprising: a wall piece mounted to a back surface of a

vertical cove wail, the wall piece having a top edge which is at the same height as a top surface of a front wail of the cove; a light fixture component removably attachable to the wail piece and carrying one or w e LEDs positioned to project light at a selected angle from the cove toward a ceiling of a room when the wall piece is mounted to a said vertical back surface and the light fixture component is attached to the wall piece; and wherein the one or more LEDs are further positioned so as to not be visible on a line of sight perpendicular to the vertical cove wall from a point looking toward the front cove wall.

2. The LED cove light system of embodiment I wherein the one or more LEDs comprise a plurality of LEDs mounted in a row adjacent a top edge of a circuit board of said light fixture component but beneath the top surface of the front wail of said cove.

3. The LED cove light system of embodiment 2 wherein, the light fixture component, and wai piece are configured to enable removable attachment to one another without the use of tools.

4. The LED cove light system of embodiment J. wherein the wall piece has a horizontal groove formed in a. front surface thereof and a hook disposed beneath the horizontal groove and wherein the light fixture component has a lip and a hook located beneath the Hp, the hook and lip of the light fixture component each being positioned, shaped and dimensioned such that the lip of the light fixture component is insertabk- into the horizontal groove of the wall piece and the hook of the light fixture component can thereafter come into engagement with the hook of the wall piece to fix the light fixture component in a selected position with respect to the wall piece.

The LED cove light system of embodiment 4 wherem the light fixture component further comprises a circuit board mounting one or more LEDs and a ierss component mounted over the circuit board.

The LED light system of embodiment 5 wherein, the lens component comprises a radiused segment located over the one or more LEDs,

The LED cove light system of embodiment 5 wherein the one or more LEDs comprise a plurality of LEDs mounted in a row adjacent a top edge of the circuit board.

The LED cove light system of embodiment 7 wherein the row of LEDs is set hack from the top edge of the circuit board by a distance is the range of .030 to ,060 inches.

The LED cove light system of embodiment 5 wherein the LED circuit, board comprises- a planar LED mounting surface disposed at an angle of 20 degrees to the vertical.

The LED cove light, system of embodiment 1 wherein the selected, angle is 20 degrees.

A method of illuminating a surface comprising; -constructing a wall piece and configuring the wall piece to be attachable to a surface: configuring a light fixture component and the wail piece to be removably attachable to one another and positioning a plurality of LEDs in a row in the light fixture component below & top edge of said light fixture component and at an angle selected to project light from the LEDs into an adjacent, space: attaching the wall piece to a vertical cove wail and behind a front cove wall at a position selected such that, when the light fixture component is attached to the -wall piece, the LEDs of the light fixture component are not visible on. a Hue of s ght perpendicular to the vertical cove wall from a point looking toward the front cove wall, the LEDs are positioned to Uluminate a surface above the vertical cove wall, and front cove wall and each of the LEDs is spaced at the same selected distance from the surface to be illuminated by light emanating from the LEDs; and attaching the light fixture component to the wall piece.

The. method of embodiment 1 1 further comprising installing an optic on the light fixture io shape the output light beam.

The method of embodiment 1 1 further comprising attaching the wall piece to a predictable structural surface.

A method of illuminating a horizontal ceiling surface comprising: constructing a wall piece ami configuring the wall piece to be attachable to a surface; configuring a light fixture component and the wail piece to be removably attachable to one another and positioning a plurality of LEDs in a row in. the light fixture component below a top edge of said light fixture component and at an angle selected to project light from the LEDs into an adjacent space; attaching the wall piece to a vertical wall perpendicular to the horizontal ceiling surface at a position selected such that, when the light fixture component is attached to the wall piece, the LEDs are positioned to illuminate the

.horizontal ceiling surface and each of the LEDs is spaced at the same selected, distance from the horizontal ceiling surface; and attaching the light fixture component to the wall piece.

A method of illuminating a first vertical wail positioned opposite a second vertical wall comprising; constructing a wail piece and configuring the wall piece to be attachable to a surface; configuring a light fixture component and the wall piece to be removably attachable to one another and positioning a plurality of LE Ds in a row in the light fixture component below a top edge of said light fixture component and at an angle selected to project light from the LEDs into an adjacent space; attaching the wall piece to a horizontal surface in front of the second vertical, wall i at a position selected such that, when the light fixture component is attached to the wall piece, the LEDs are positioned to illuminate the first vertical wall and each, of the LEDs is spaced at the same selected distance from the first vertical wall; and _. attaching the light fixture component to the wall piece.

The method of embodiment 15 wherein the horizontal surface is a horizontal floor surface.

The method of embodiment 15 wherein the horizontal surface is a horizontal ceiling surface.

A method of illuminating a surface comprising; constructing a wall piece and configuring the wall piece to be attachable to a surface; configuring a light fixture component and the wall piece to be removably attachable to. one another and positioning plurality of LEDs in a row in the light fixture component below a top edge of said light fixture, component and at an angle selected to project light from the LEDs into an adjacent space;

attaching the wall piece to a vertical cove wall and behind a iron! cove wall at a position selected such that, when the light fixture component is attached to the wall piece, the LEDs of the light fixture component are not visible on a line of sight perpendicular to the vertical cove wall from a point looking toward the front cove wall, the LEDs are.

positioned to illuminate a surface above the vertical cove wall and front cove wall., and each of the LE Ds is spaced at the same selected distance from the surface to be illuminated by light emanating from the LEDs; attaching the light fixture component to the wall piece; and employing the light fixture to deliver light to the ceiling surface with an efficacy and intensity sufficient to illuminate the room beneath the ceiling.

The method of embodiment I 8 where the illumination provided to the room is sufficient to illuminate the room without the use of any other ceiling mounted light fixture, including but not limited to dowmight fixtures, including but not limited to dowalight cans.

The method of embodiment 18 wherein, the efficacy is 85% or greater. A method comprising, or the method of embodiment 1 i further comprising, : constructing an LED light fixture to have a plurality of LEDs positioned to illuminate a ceiling surface when the LED light fixture is mounted in a cove adjacent the ceiling surface; and enabling the LED light fixture to provide illumination of the ceiling surface with an efficacy and intensity sufficient to illuminate a room located beneath the adjacent ceiling.

The method of embodiment 21 wherein the step of constructing an LED light fixture comprises attaching a plurality of LEDs in a row on a printed, circuit hoard:; and mounting the printed circuit board so as to direct light upon the celling surface when the LED light fixture is mounted in the cove.

A method comprising: positioning a plurality of LEDs in a row in a cove such that the light generated by the LEDs is directed to illuminate a ceiling surface adjacent the cove; and controlling the light generated by the LEDs so as illuminate the ceiling surface with an efficacy and intensity sufficient to illuminate a room beneath the ceiling.

An LED cove light system comprising: a cove located beneath a ceiling of a room, the cove having a rear vertical wall spaced apart from a front wall.; a wall piece mounted to the rear vertical wall of the cove, the wall piece having a top edge which is at the same height as a top surface of a front wall of the cove; a light fixture component which is removably attachable to the wall piece and which carries one or more LEDs positioned to project light at a selected angle front the cove toward the ceiling of the room when the wall piece is mounted to the rear vertical wall of the cove and the light fixture component is attached to the wall piece; and wherein the one or more LEDs are further positioned so as to not be visible on a line of sight perpendicular to the rear vertical wall of the cove from a point looking toward the front wall of the cove. An LED cove light system comprising: a cove located beneath a ceil ing of a room, die cove having a rear vertical wall spaced apart from a front wall; 8 wall piece mounted to the rear vertical wall of the cove; a light fixture component, comprising (a) a circuit hoard mounting & plurality of LEDs in a row, (b) a lens component, and (c) a reflector, wherein the light fixture component is removably attachable to the wall piece; wherein the circuit board is positioned at an. angle selected to project ligh ^' from the cove toward the ceiling of the room when the wall piece is mounted to the rear vertical wall of the cove ami the light fixture component is attached to the wall piece: wherein the lens component is disposed over the plurality of LEDs and has no optic effect on light transmitted through the lens component; and wherein the reflector is positioned beneath the plurality of LEDs to redirect light emanating from the plurality of LEDs.

The LED cove .light system of embodiment 24 or embodiment 26 wherein, the plurality of LEDs or the one or more LEDs. respectively, and the reflector are selected to deliver light to the ceiling sufficient to achieve a. single luminous ceiling plane and to provide the primary lighting source to the space beneath the ceiling plane.

The LED cove light system of embodiment 25 wherein the space is a room.

The LED cove light, system of embodiment 24 or of embodiment 26 wherein the plurality of LEDs or the one or more LEDs, respectively, and the reflector are selected such that the illumination provided to the space is sufficient to .illuminate the room without the use of any other lighting fixture or fixtures, including, but not limited to down ight fixtures, including but not limited to down ight cans.

An LE D cove light system comprising: a cove located beneath a ceiling of a room, the cove having a rear vertical wall spaced apart from a front Wall; a wall piece mounted to the rear vertical wail of the cove; a light fixture component comprising a circuit board mounting a plurality of LEDs in a row; and wherein the plurality of LEDs. are positioned so as to project light out. of the cove toward the ceiling of the room with an efficacy of 85% or greater when the wall piece is mounted to the rear vertical wall of the cove and the light fix uri component is attached to the wall piece.

The LED light system of embodiment 28 or the embodiment L wherein said light fixture component further comprises a lens component and a reflector and wherein the lens component is disposed over the plurality of LEDs or the one or more LEDs respecti ely and has no optic effect on light transmitted through the lem component; and wherein the reflector is positioned beneath the plurality of LEDs or the one or more LEDs respectively to redirect light emanating from ^' the plurality of LEDs.

An LED cove light fixture comprising: a wail piece adapted to be mounted to the rear wall of a cove; a light fixture component comprising a circuit board mounting a plurality of LEDs in a row; and wherein the plurality of LEDs are posi ioned so as to project light out of the cove toward a ceiling of a room with an efficacy of 85% or greater when the wall piece is moun ted to the rear vertical wall of the cove and the light fixture component is attached to the wall piece.

The LED light system of embodiment 30 wherein said light fixture component further comprises a lens component and a reflector; and wherein the lens component is disposed over the plurality of LEDs and has no optic effect on light transmitted through the lens component; and wherein the reflector is positioned beneath the plurality of LEDs to redirect light emanating from the plurality of LEDs.

Either method of embodiment 21 further comprising applying a finish to the ceiling having a light reflectance value greater than 70.

The method of embodiment 22 further comprising applying a finish to the ceiling have a light reflectance value greater than 70. The method of embodiment 23 further comprising applying a finish to the ceiling, having a light reflectance value greater than 70.