Amongst other things I am rewiring the kitchen lights. I have 2 gang dimmer, 1G to 4x 12V halogen ceiling lights - work perfectly.
The other G is the problem, connected to a standard bulb pendant light - works perfectly. In this same circuit I also introduced some 12V under cupboard lights which will also work perfectly but not together with the bulb fitted. After 2 or 3 secs all lights will flicker and the 12V units will hum. I then remove the bulb and the 12V lights behave as they should or conversely switch off the 12V lights (ea unit has a switch - IKEA) and the bulb is OK. There is somehow an incompatability here.
Perhaps I need to replace the bulb with a halogen unit?