Why do LED lights glow even when the lights are off?

Question

Do it yourself

Hello everyone, I changed ordinary 50w 12v lamps (halogens) to led. Everything works, but I noticed one very strange thing. When I turn off the light, one or two diodes inside the lamp still burn very very dimly, if you do not peer, you will not notice. And if you move the "antennae" of the iron edging of the shades, then the glow intensifies. Insulation is good everywhere.

Photo of the observed effect

Answer 1

Well, everything is clear here. Traditionally, a switch was hung on the wrong wire - zero is cut down, but the phase remains. Thus, the light bulbs are constantly energized.
There are other similar traditions - hot water flows from the blue tap, cold water from the red one; switch down turns on the light, up turns it off, etc. It's all about hand-to-hand craftsmen. :)

Answer 2

LED lamps have a very low current consumption and usually a large operating voltage range, more often it is 85-260V, so they glow even from the slightest current leakage.
Common causes of leakage:
1. Illuminated switch - the circuit is constantly energized, it is not enough to light a conventional or halogen lamp, but it is enough to feed an LED or energy-saving lamp
2. The switch breaks the wrong circuit - at one time the rules prescribed a circuit where the switch breaks the zero bus, and not the phase one, supposedly for safety so that the current strikes less, such a scheme is common in Khrushchev and some of their followers. it is applicable only for incandescent lamps, because diode and luminescent again get leakage through the reinforced concrete structures of the building, parallel lines, etc.
3. There are sometimes other less common factors