FRF light problem...

[2cvbloke]

Basically, the light keeps going dim, it's a 6w fluorescent light and I've just replaced the tube (as the old one had become badly scorched because of the lack ofenergy for a proper discharge), I've tried opening the light and drying it out, but it's not worked, so is there anything I can do short of replacing the whole light fitting?

FRF is FishRfun by the way, one of them hexagonal tanks...

[2cvbloke]

Anyone? Any ideas???