nopiano said:
Somewhere I have a mains noise sniffer, which is enlightening as to what makes the most noise on the domestic ring. Low energy light bulbs were the worst - the coiled fluorescent type.
Must dig it out soon and test the newer led down lighters.
My old amp idles at over 40 watts, which means it is always warm. Wouldn't allow that these days!
I don't have noisy mains (that I can tell), but i'd still be interested in your findings. All the ground floor lighting is now LED, except for the conservatory and I am about to get LEDs in there too. The 1st floor is around 70 percent LED but it's on a different ring and separate breaker anyway.
A cursory search on google only brings up issues with audible (not mains) noise from people using LED bulbs with dimmers. We have no dimmers except for two bedroom lamps that have specifically designed dimmable LED bulbs that - again - are on a different ring to the hi-fi downstairs. No noise problems with them. Just looked for the label that said 'dimmable' on the lightbulb boxes.
Anyway, the bedside lamps are seldom in use at the same time as the hi-fi.