I have a room with 9 pairs of halogen lights, currently all wired to one switch, and one circuit. So 18 total lights, with pairs sharing appropriate boxes. This might actually be more then is allowed for 1 circuit, but is for sure more than a single dimmer can handle. I'm resigned to rewiring things, wondering however what I can get away with. Physically distributed in 3x3 pairs, it doesn't ascetically easily break in two, except breaking up each pairs of lights.
Would it be acceptable to use 3 wire in this case? i.e. wire all "left" lights with the black hot, all "right" lights with the red hot, and a common neutral? Side-by-side dimmer switches, and input side of dimmers only with the existing single hot from the panel.