LEDs are rapidly growing as the preferred light source for efficient interior and exterior lights. The relative efficiency of LEDs compared to incandescent and even compact fluorescent lighting makes them particularly attractive, plus they demonstrate long life and good physical durability. Ongoing research continues to improve the color characteristics and luminous output of LEDs.
However, the design of LED luminaires presents some unique design challenges. Unlike incandescent lights in particular and to a lesser extent compact fluorescent lights, LEDs are quite sensitive to temperature. Like other semiconductor devices, LED failure rates dramatically increase as the junction temperature exceeds 100°C.
Additionally, the light output, color characteristics and electrical characteristics all vary with temperature. Because of this, the best simulations of LED luminaires will couple the electrical, thermal and flow effects together. This webcast demonstrates several LED luminaire simulations using STAR-CCM+ including a coupled electrical-thermal-flow simulation and the optimization of a heat sink for an LED luminaire.