On Thu, 21 Sep 2017 13:09:39 -0700, DICEGEORGE wrote:

thanks Bob, 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? [george]

No, it uses the filament of the bulb as a path.

They are connected to CFLs, and they still work.

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