went to a job today.... cow shed TT(as is a lot of the Island).... feeding another cowshed with 6mm SWA (no TT at second shed but good Zs)..... app 60m sub main to new cow shed(cows in, dont I get all the good jobs)....recently insalled 300w halogen floods x 3...2 lamps blown.... not just blown ...both ends of lamp blown to bits. Could this be volt drop??? (6mm SWA feeding 1kw lighting and 2 twin sockets never used)