I've been hearing two different answers to this and thought I would ask the experts. Do you total up the entire length of wire including all the T-offs in order to get your total run length? Or do you just add the distance from your power source(fusebox) to the furthest Light in the run, with the distance form said light to the grounding point? I'm running six .25 amp(1.5 amp total) led puck lights in parallel on a 24v system. I would like to include a couple '2-way' light switches but I'm concerned the extra wire required would put me over my run length limit with the 16 gauge stranded wire I have installed.