Ive got a problem with my outside lights keep tripping the main fuse for them. Originally there were two 100w bulbs connected to a sensor and wired into a 6 amp fuse in the garage fuse box. As they didnt light up much of the driveway i removed the 100w bulbs and fitted a 150w and a 500w floodlight in their places. This seemed ok for a while but i moved the 150w to a basic cable and plug so i could move it round the garden and then put another 500w floodlight instead so i have two 500w floodlights on one circuit. The thing is, after them coming on a few times, for about 30secs, the fuse trips out. Is 1000w too much to go through a normal lighting circuit or is a different rated fuse needed for these type of lights? The cable is quite thick so i dont think its that what is causing the problem, its around 12-15mm 3 core flat grey cable. Any ideas on what to do to get both lights working off the same sensor?