This paper describes fabrication and characterization of a solar simulator which utilizes light emitting
diode (LED) as a lighting source. A solar cell powered by the LED simulator with 0.9 sun exhibited about
80% of the output power generated by the conventional Xenon lamp simulator with 1 sun. Measured
temperatures for the surface of lens and fin of heat sink were in good agreement with the calculated values.
Detailed thermal performance of the LED lighting was projected using a computational fluid dynamics
(CFD) method for the various design parameters such as layout of the LED package and number of fins
of the heat sink. It was demonstrated that the junction temperature of the LED module can be signifi-
cantly decreased by optimization of the parameters.