DICEGEORGE wrote:

http://www.diy.com/departments/mk-ne...r/53970_BQ.prd
MK Neon Locator
its goes between a light switch and the wall
and takes a crumb of elec from earth and live,
not enough to trip the RCDs I hope if I have 20 of them?

I assume from the "TUNGSTEN GLS LAMPS ONLY" you're supposed to wire the
neons across the switch, rather than live to earth, so they only glow
when the light is off ...