Alternatively just use a lamp with a built in photocell, provided
that the fitting allows it to "see" the outside light levels
properly
http://www.lightbulbs-direct.com/pro...asp?ProdID=115


I've tried some of these types in the past and always had the problem
of them "flashing off" briefly every 20 or so seconds.

Tried them in different positions both inside and out.

Seems the light from the bulb is trying to turn itself off !

A pity they would be very useful otherwise

Robert
Robert