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On Friday, 23 August 2019 13:38:33 UTC+1, Lee Nowell wrote:
Hi All,

A friend was around yesterday and she was describing an issue she is
having with one of her lights. In the bathroom she has a number of spot
lights (believed to by 240v) and when switch on, all lights come on as
normal. When she turns them off, one of the lights flashes on and off
continually. It would appear as though this is fully on then fully off
(i.e. not dim).

This has only recently started to happen and no work has been done on the
house to suddenly cause it. I did wonder if for some reason an emergency
light was fitted (i.e. as in offices where they come on in the event of
power loss) but apparently they are all the same and no little led lights
on them to indicate these.

I can not think of anything that could cause this behaviour. Anyone have
any ideas?

thanks

Lee.

Possibles:
1. Leakage R in bulb has gone o/c, now it's powering from capacitive cable
coupling

2. dodgy switch or wiring

Never seen a dodgy switch or wiring do anything like that. Dont believe it.