Most manufacturers now advertise that the life of the LED lamp is 50,000 hours.
First introduce the unit of hertz (stroboscopic), Hz stands for frequency.
There are mainly chromaticity coordinates, dominant wavelength
Choosing a lamp is not a difficult task, but if the problem is changed to choosing a lamp for children
Blog280700633@qq.com2021-09-29T07:02:30+00:00