光度学与光相关的常用量4个：发光强度、光通量、照度、亮度。这4个量尽管是相的但为不同的，不能相混。正像压力、重力、压强、质量是不同的物理量一样。 1、发光强度 (I、Intensity)，单位

火灾是人类的大敌，它具有疯狂性、恐怖性、毁灭性的特点。因此，学消防、懂消防和掌握一些必要的消防常识是公司对所有员工的基本要求。 一、工厂消防安全知识消防 消防是预防和扑救火

氙气灯发光原理 （ HID ） 氙气灯的发光原理是在UV-cut抗紫外线水晶石英玻璃管内，以多种化学气体充填，其中大部份为氙气。氙气灯 （Xenon）与碘化物等，然后再透过增压器（Ballast）将车上12伏特

Dust frequently poses a negative environmental condition. This also applies to work carried out in a field or at a construction site, for example. This is why we thoroughly test our products for their dust-sealing properties. During this quality test,

2015 was supposed to be the year when LED lighting would really start to take off. Prices for lamps were already under $10, with some even under $5 and we still stand by our growth estimate of around 85% unit growth for LED lamps with 45% revenue grow

Dear valued customers, welcome to visit our website. We’ve made reformation on our website. Here you could see that our website has been changed a lot. Plentiful of new functions, rich of products information. The most important thing is, there is V