23 Jan '14, 2am

Innovative Phillips LED Light Bulb Already Available - On January 1, 2014 the federal ban on manufacturing 40- and...

The reason why the bulb is flat is that this shape has allowed Philips to do away with the heat sink found in other LED bulbs. Even though LEDs don’t get as hot as incandescent bulbs, the LEDs themselves are very heat-intolerant meaning they need to be kept cool. In most LED bulbs this is achieved via a metal heat sink around the base of the bulb. By making the bulb flat, Philips engineers could arrange LED diodes in a horseshoe pattern, which helps to dissipate the heat. More specifically, since the diodes are not arranged in a tight circle, as in other LED light bulbs, the heat they radiate is directed outward, in an arc across the surface of the bulb.

Full article: http://www.jetsongreen.com/2014/01/innovative-phillips-le...

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