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Why LED Bulbs Don't Always Live Up to the Hype About Their Life Spans - WSJ
Every Light Bulb You'll Ever Need | Lightbulbs Direct
Longer-lasting light bulbs: it was complicated - YouTube
Light Bulbs — Kathleen Hills
A light bulb moment: Why the energy we don't use holds the answer - Wicked Leeks
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So, you still aren't using LED light bulbs... - CNET
The Shapes and Sizes of Light Bulbs | Super Bright LEDs
BBC News - Why eco-light bulbs aren't what they seem
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