A low profile troffer light known as an illuminated LED panel light uses a flat LED module to send light straight through the optical reflector. The disadvantages of edge-lit products are intended to be addressed by this arrangement.
LED panel lights with edges illuminated have numerous demonstrated advantages. These surface emission devices have the ability to produce uniform, gentle lighting across the complete light emission surface. (LES). A light guide panel (LGP) is used in edge-lit technology to evenly spread and direct the light that the side-firing LEDs emanate downward. The use of the LGP presents a dependability problem even though the ground-breaking edge-lit LED construction allows an incredibly consistent light dispersal and low profile design.
LGPs composed of polymethyl methacrylate (PMMA) or even styrofoam are used in most edge-lit LED screens. (PS). Compared to LGPs constructed of plastic, these LGPs are less expensive. (PC). PMMA and PS LGPs, however, have worse temperature stability. Over time, they will begin to noticeably discolor. In comparison to PMMA and PS polymers, polycarbonate has better temperature stability, which results in greater color stability for LED illumination uses. However, because of the high expense, PC polymers are rarely used in edge-lit LED devices.
In addition to having a short lifespan when subjected to radiation at high temps, polymers LGPs also deteriorate under extended, intense UV exposure and undergo color shifts when exposed to high accumulating wetness. An edge-lit LED panel light will frequently fail catastrophically as a result of all these shifts in the visual characteristics of LGPs.
High visual stability and cost are prized qualities of backlit LED panel lights. The susceptibility of the edge-lit optical design is addressed while the components count is decreased by the lack of LGPs. Without sacrificing light production, the illuminated design also lowers the use of SMD LEDs. The traditional difficulty with the illuminated design is that a thicker profile is required to get rid of precise LEDs' obvious hot spots. Since optical diffusion technology has advanced, ultra-thin backlight systems that mimic the optical performance of edge-lit systems are now feasible.
