In message , Chris J Dixon
writes
Graeme wrote:

Could you not keep life simple and use a plug in LED night light? We
have a couple, and they just work.

Some of them even have a PIR, so only come on when needed.

Yes, ours does.

Working out the payback time of the extra cost, against power
saved, is left as an exercise for the student.

Uh oh. OK, assume 8 hours per night, 365 nights, is 2,920 hours p.a.

A standard 60w bulb will burn 160 kWh, so cost, at 12p per kWh, is
£19.20 per annum. An LED night light burns 0.5w, so 1/120th the cost,
or 16 pence - is that right???

LED night lights are around a fiver to buy.

--
Graeme