LED lamp and lamp with high and low points?
The low voltage is internally without drive and needs to be supplied with a power supply and then connected to the 220V.
LED lights to light, you must have a power drive, high voltage means to connect high 220V use, with internal power driven.
I don't understand what you say,The normal white light source is the basic 3V to light, if you give a 2.7/2.8V or to light up, but if you give a 1.5V is absolutely not bright,It depends on his volt ampere characteristics,We should look at how much light with a lamp, and on a few a few,
