High light efficency , concentrated light, no additional ballast, which can take place of incandesce lamp, reducing investment fees.
特点:发光效率高,光线集中, 不需要附加镇流器, 可直接与白炽灯互换使用, 减少投资费用.
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"the lamp was incandesced"
"an incandescing body"
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