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LED lamp - Wikipedia
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Swap Your Conventional Light Bulbs for LEDs at No Charge! | Sustainability | Washington University in St. Louis
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Types of LED Lights - The Home Depot
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LED Lights: To LED or not to LED?
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Incandescent light bulb - Wikipedia
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It's Hot in Here: Which Light Bulbs Produce the Most Heat - Attainable Home
LED vs. regular lightbulbs: Do they really make a difference?
LED vs Halogen: Is LED or Halogen Better? – LED Hut
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CFL vs. LED vs. Incandescent Light Bulbs - Ideas & Advice | Lamps Plus
Household savings: LED bulbs gaining in cost efficiency
