Incandescent light bulb - Wikipedia
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LED lamp - Wikipedia
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LED lights could contribute to massive carbon reductions
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Ultra efficient | Philips lighting
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Buying LED Bulbs? Good. But Here Are 5 Things to Think About First - CNET
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Amazon.com : Universal 12V-100V 1200lm High Brightness Electro-Tricycle LED Light Tricycle Conversion Lamp Electric Bike LED Lights : Sports & Outdoors
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