Small-Area Array-Based LED Luminaire Design

Investigating Organization
Cree, Inc.

Principal Investigator(s)
Thomas Yuan

Subcontractor
None

Funding Source
Building Technologies Program/NETL

Award
DOE Share: $1,651,867; Contractor Share: $610,947

Contract Period
01/10/05 - 01/09/08

Cree Inc. Santa Barbara Technology Center (SBTC) is designing and developing a compact light emitting diode (LED) based luminaire that could enable the replacement of a significant portion of the current incandescent market. Specifically, the program targets a BR/PAR-style integrated reflector luminaire suitable for low-cost insertion into existing commercial and residential lighting fixtures.

Since performance alone will not be the sole metric determining eventual wide acceptance of LED-based lighting into commercial markets, Cree will utilize a rapidly growing foundation of commercial LED and LED package manufacturing experience to ensure cost effective, manufacturable solutions are implemented in an integrated luminaire suitable for high-efficiency, drop-in replacement of existing incandescent light sources.

So far, the bulk of the work under the program has been focused on designing an LED array for the luminaire.  We have achieved white LED arrays with an efficacy of 78 lumens per watt at 350 mA.  A thermal resistance of 8oC/W from junction to board has been realized.  These arrays will be the basis of the luminaire.

Content dated 2/08