Global Lighting Technologies (GLT) has introduced an LED-based, edge-lit, UL-certified flat panel downlight that is an efficient SSL solution for ceiling lights. The company claims it delivers efficiencies of more than 70 lm/W, using standard GLT 2 x 2 ft troffer packaging with a CRI of more than 80.
The LEDs in the panel offer brightness of 130 lm. Using 100 LEDs, the downlight gives 3250 lm at a colour temperature of 4000 k at 46 W.
70 lm/W is usually achieved by using a thicker light box approach or densely packing LEDs through all four edges of the light guide plate (LGP). GLT’s downlight, however, maintains a thin profile with LEDs spaced along two edges of the LGP.
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