誰告訴你的?光效率約15%?
所有跟帖:
• 15%?那是白熾燈的效率,LED不可能這麽低。 -九叔- ♂ (0 bytes) () 10/09/2017 postreply 06:58:46
• 15%?那是白熾燈的效率,LED不可能這麽低。 -九叔- ♂ (0 bytes) () 10/09/2017 postreply 06:58:46
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