Ceiling lights?

Sounds like an over heating transformer, they are designed to cut out to prevent damage.

In order to fix you need to pull the whole fixing down and pull the wires out of the hole and a transmformer will also come out. Make a note of the transformer rating (eg 20-60VA) so you can get a similar one.

Remember to turn off the electricity before you start

Mr Handy Andy
November 2008