I fitted new lights to both downstairs and upstairs last Tue. The downstairs light is fine, but the upstairs lights glow at night when switched off. We have a 3 way switch downstairs and a single switch upstairs. As luck would have it we had solar panels fitted last Wed and one of the team was an electrician. I initially thought I had wired the lights wrongly, or insecurely. He checked and said it was good but to change the wires around having seen we had 2 black wires in the feed but 1 had some blue tape marking it. I did this and all was well until I noticed the lights were glowing again last night. The bulls are G9 LED. I have read that there is normally a residual current in many light fittings and that as LEDs require so little power to work that this residual current can make them glow. Is that correct? Is it a problem if they glow?
There is no "Residual current" in light fittings. (If there were, how come it lasts so long and where is it "stored" Rhetorical question)
What you do have is induction, it has always been there but has become more noticeable since the advent of CFL and LED lamps, it is very common on 2 way switching. You can fit a "suppressor" to stop the effect, (But you have to get the right one) or if your light fitting has multiple lamps change one to an incandescent lamp, or you can leave it as it is and use it as a "night light" there is no harm or danger being caused.
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