A comparison of light given off by three 60 watt-equivalent bulbs.
A comparison of light given off by three 60 watt-equivalent bulbs. TONY CENICOLA NYT
A comparison of light given off by three 60 watt-equivalent bulbs. TONY CENICOLA NYT

Editorial: In search of the ideal light bulb

December 14, 2015 7:42 AM

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