We have a double ganger light dimmer and after many years one of the lights, a 300w halogen would only come on intermittantly. We changed the dimmer, which I rewired the same as the original, but the problem remained. We have now replaced the ceiling rose & light fitting and tried various types of bulb, a hologen flickered rapidly and then went out, a low energy bulb flickered initially, went out and then came back on very dim; traditional bulbs only comes on very dim.

Bob, January 2010

Have you still got the dimmer in the circuit? If so temporarily replace that with an ordinary switch and see what that does.

Adam, January 2010