现在我们使用的大都为节能灯、led灯，不仅电光转化率得到了极大的提升，电能的消耗也降低了很多。 那么，我们常说的这个瓦数（w），在节能灯、led灯、白炽灯之间该怎么转化呢？或者说，每一瓦的led灯，相当于多少瓦的节能灯、白炽灯呢？

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