Rooting around in the fascinating stuff at the bottom of a draw labelled 'Engineering - Junk Miscellaneous'. Delving amongst the delightful...
An Engineer in Wonderland – When LED lighting glows at night
Having installed a commercial LED ballast and found that the ‘off’ setting leaves the LEDs glowing faintly, I have heard of a second case of this phenomenon.
The glorious editor (blessed be the ground he walks upon) stayed in a French hotel room that had LED bedside lights, which also continued to glow when ‘off’.
Now we are curious. Has anyone else had such an experience?
I have not fully investigated mine yet, but through some quick comparisons would say that my LEDs have around 100µA passing through them, and it may be 50Hz leakage.
Much as I realise there may be as many causes as instances, including me messing up the installation, but does any one know what is going on here?
Bleed through the primary to secondary EMC capacitor maybe? – but where would the return path be?
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