CLTC will characterize LED lumen deprication and color shift over a period of 8 months at multiple ambient temperatures. Activities will include:

• Development of a testing protocol based on the IESNA’s draft protocol for lumen depreciation in solid state LED lighting

• Design and development of three testing chambers that will maintain specified ambient temperatures throughout the test period (Freezer case temperature, refrigerator case temperature, and room temperature)

• Design of a data acquisition system to monitor ambient temperature, total lumen output, and spectral power distribution throughout the test period

LED testing area		LED technology in testing booth		LEDs in freezer environment

Status: In progresss

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