In article ,
BigWallop wrote:
If you say you don't think it's ever been off, then it'll just be tired
little neon lamp. The neon lamp on a 240 Vac switch is just an arc of
electricity between two electrodes which makes the neon gas glow. If
it's been on all this time, 2 years, it will flicker more

I'd guess my cooker one is about 20 years old and never switched off.
Doesn't flicker, though.

--
*Okay, who stopped the payment on my reality check? *

Dave Plowman London SW 12
RIP Acorn