标题: EcoLight: Improve Your Lighting in 5 Minutes [打印本页] 作者: Gail093820 时间: 6 天前 标题: EcoLight: Improve Your Lighting in 5 Minutes The manufacturers of low cost LED bulbs always cheat. The testing normal for the lifespan measurement is all the way down to 70% authentic brightness, but when the bulb is tested either as an "indicator" or a "decorative" light, then it might probably go down to 50% brightness and also you don_t have to disclose that on the packaging. A lot of the bulbs which are made to mimic regular lightbulbs are "decorative". 70% is the restrict as a result of humans are dangerous at judging brightness levels directly, since the attention quickly adjusts to gentle falling on it. In absolute phrases, there may be an enormous distinction between the outdated and the brand new bulb, but you don_t easily discover the difference. A method to test absolute brightness is to face two of the identical bulbs towards one another and put a sheet of baking paper in between. You may then transfer the paper to see from both facet the place the opposite mild stops shining via. If it_s not symmetric, you understand which bulb is dimmer.