hi. i'm wondering if i could use a dimmer on a low voltage cable track lighting. i ask home depot and they said i could, but i'm still not sure. the kit has 6 12v halogen light bulbs, 20watts each. theres the cables and the transformer. the dimmer i'm planning to use a lutron maestro ir. please help me out. and one more question. i have some uf-b wires left from a previous project. could i use it inside a wall? if not i would go get some nm-b wires. thanks.