Written by coream at 3/10/2009 02:35:00 PM Turn your ordinary E27 or GU10 lightbulb socket into a source of clean light with the Philips Master LED Bulb. Available in warm and cool white, each bulb is rated for 45,000 hours of use — 45 x longer than incandescent, 25 x longer than halogen, and 10 x longer than fluorescent — and offers an energy savings of up to 80%, making them the greenest bulbs you can buy...