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40W 白炙灯 should get the higher temperature than 40W 节能灯. This is because the 白炙灯 uses heat to produce light and therefore its efficiency is so low. On average, it produces 17.5 lumens per watt of power. Lots of power is dissipated as heat rather than light. - W; K* `3 R8 s# h. ]
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On the other hand, 节能灯 gets the better efficiency and it normally produces 60 to 72 lumens per input watt. That means much less power will be converted into heat. The temperature is therefore much lower than 白炙灯 although the rated powers of these two lamps are the same. |
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