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led灯泡蜡烛灯泡生日LED灯泡工艺装饰灯具

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USD $22.17
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USD $21.48
≥501/piece

USD $20.46
≥3001/piece

100 piece

Item No. A-60
Stock num 999999 piece

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维菲电子科技有限公司

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Description

产品简介

电灯 diàndēng [electric lamp;electric light] 用电作光能源的灯

（Electric lamp），准确技术名称为白炽灯（Incandescent light bulb）。人工光源之一。

它是电流把灯丝加热到白炽状态而用来发光的灯。电灯泡外壳用玻璃制成，把灯丝保持在真空，或低压的惰性气体之下，作用是防止灯丝在高温之下氧化。它只有7%～8％的电能变成可见光，90％以上的电能转化成了热，白炽灯的发光效率很低，然而，它却是电灯世界的开路先锋。现代的白炽灯一般寿命为1000小时左右。电灯是根据电产生热的原理制成的。现在的灯泡一般都选用钨丝做灯丝。

Update time：20210527162544