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Philips LED 433557 Energy Saver Compact Fluorescent T2 Twister (A21 Replacement) Household Light Bulb: 6500-Kelvin, 23-Watt (100-Watt Equivalent), E26 Medium Screw Base, Daylight Deluxe, 4-Pack - - Amazon.com
What do you understand by the thermal conductivity of copper is 40 Watt per metre per Kelvin? - Quora
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