light because green leds are often weaker than red and blue leds two green led are used for every red and blue led these leds are mounted on printed circuit board 802 which has a reflective structure in area surrounding the leds this pcb with the led will be surrounded by 4 reflective walls and covered with a refractive structure and a diffuser as shown in fig7 in one embodiment the refractive structure is a prismatic film such as the one shown in fig9 in this top view of the prismatic film each prism has 4 sides 901 902 903 and 904 the apex of the prism is 905 prisms with more sides can also be utilized in this present invention in one embodiment the prism structure is irregular random or pseudorandom with a variation in the size apex thickness or other aspect of the prisms for at least a plurality of the prisms fig1 shows a linear prism array according to an embodiment of the invention two of such linear prisms can be stacked together with one being rotated to be perpendicular to the first one the reflective structure surrounding the leds can also be made of a prismatic structure or some other manufactured surface to reflect the light upwards fig1 is a diagram of an embodiment of the invention adding a polymer with particles to aid diffusion in this embodiment the space 1109 inside the enclosure is filled with a polymer containing particles such as particle 1110 having a refractive.