Mike Clarke wrote:

I'm looking for a gizmo to make a light go on when it is dark. More
specifically, it should go into a bayonet light socket, and allow a
bulb to plug in on the other side.

Would a low energy lamp with built in sensor be suitable? Screwfix have
them at 12.95 quid (quote no. 18491). They claim to come on at dusk and
off again at dawn and would avoid the need for an adapter.

Thanks, I'll have a lookout for that.

--
Timothy Murphy
e-mail (80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland