節(jié)能燈從通電到光通量達(dá)100%需要多長(zhǎng)時(shí)間
節(jié)能燈從通電啟動(dòng)后到光通量100%全亮需要多長(zhǎng)時(shí)間?能否幫忙給個(gè)答案,什么標(biāo)準(zhǔn)里有這項(xiàng)規(guī)定啊!!
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