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Philips LED's most energy-efficient A-class bulbs | Signify Company Website
MIT's new warm incandescent light bulb is nearly 3x more efficient than LEDs
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Signify launches the Ultra Efficient range of lighting solutions - Electrical Contracting News (ECN)
NanoLight - The world's most energy efficient lightbulb! by Gimmy Chu, Tom Rodinger, Christian Yan — Kickstarter
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GraySquare Solar - What are the best energy efficient light bulbs: The most energy efficient light bulbs are compact fluorescent light bulbs, or CFLs, and LED bulbs. CFLs use mercury to cause
4 Types of Light Bulbs: Which is More Energy Efficient