3.1 Introduction

LEDs, like all electronic devices, are temperature dependent. LED performance strongly depends on the ambient temperature. Operating LED-based luminaires at high ambient temperatures without proper thermal design may overheat LED packages, eventually lead to short lifespan or device failure in the worst case. Well-designed cooling system is required to maintain long lifetime and high efficacy of the luminaire (Figure 3.1.1). Therefore thermal management is the most critical part within LED-based luminaire design.

a) b)

Figure 3.1.1: a) Thermal simulation results. b) picture of the same luminaire taken by thermo-camera.

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