LED Lamp Sets Efficiency Record

A prototype 4.75-inch parabolic aluminized reflector (12cm; PAR-38) lamp using light-emitting diodes (LEDs) has shattered the efficacy record for reflector lamps by delivering 659 lumens using just 5.8 watts of electricity—for an efficacy of 113.6 lumens per watt. The lamp was made by LED Lighting Fixtures (LLF), whose LR6 recessed downlight was recognized by BuildingGreen as a 2007 Top-10 Green Building Product (see EBN Vol. 16, No. 11). The lamp’s performance, tested by the National Institute of Standards and Technology (NIST), is dramatically better than that of the best reflector-style compact fluorescent lamps (CFLs) on the market. The color temperature was measured at 2,760 kelvins (similar to incandescent) and the color rendering index (CRI) at 91.2—also significantly better than CFLs. (Incandescent lamps have a CRI of 100.)

...

To read the complete article, please login below.

BuildingGreen.com