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Philips LED's most energy-efficient A-class bulbs | Signify Company Website
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Maine Residential Energy Efficient Lighting Solutions | Efficiency Maine
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Ultra efficient | Philips lighting
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NanoLight - The world's most energy efficient lightbulb! by Gimmy Chu, Tom Rodinger, Christian Yan — Kickstarter
Do energy-efficient bulbs save money at Batteries Plus
LED Technologies: How it Revolutionized the World
Light Bulb Comparison Guide - The Lightbulb Co. UK
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LED Lighting | Department of Energy
Energy Dept. to ban sale of some light bulbs: Here's why | The Hill
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Ultra efficient | Philips lighting
