Led-based light bulb

摘要

A light source (10) comprising: a light engine (16) for generating light, an enclosure (22) and a base (24). The light engine (16) includes a platform (14), and at least one LED (12) disposed on the platform (14). The enclosure (22) surrounds a light generating area of the light engine (16). The base (24) includes an active cooling unit for dissipating thermal energy away from the at least one LED (12); and a conversion circuit (30) for supplying electric power to the light engine (16).