sorry i am posting so much hear just having a hard time finding the info i need. i am planning to replace my old fiberstar system (it is torn up and missing parts) with led lights. my plan was to pull the new led lines through by using the old fiberstar lines. my question is i have two lights (one in pool and one in hottub) but there are 3 lines going into the conduit. The light blue one comes out in the hotttub and the large one is the same size as the one that comes out in the pool but i am not sure what the smaller black one is that shares the conduit with the pool light. any ideas on this one?