Help.... I seem to have used lots of those R50 halogen light bulbs and my lights trip when the majority of them are on. Now reading up on the cause for the tripping it could be one of 2, 1.bad earth (not breath!) 2. Overloading. I have...20.... R50 bulbs on this one circuit. Can I upgrade the 5amp fuse (and how do I?) which keeps tripping, knowing I have used 1.5 cable for the job? or any other suggestions.....? because it's driving me