Ethan's info is great, but raises larger question, do you have a "technical electric service." Lighting and equipment power need to be separated, but how this is implemented is a much larger topic. Often I suggest instead of dimmers at all, can you get by with lighting options?---several light circuits without dimmers, but that give you different moods and satisfy all the lighting needs (lots of light tracks on to find the screw on the floor, down to one lamp shining on the back wall for "cozy"). Several separate switches running to several light tracks or cans is easy; high quality dimmers that don't send trash back down the line are expensive, heavy and more difficult to install. Sure, I use them when possible. But In any case, find out more about separating lighting, air cond and equipment electric at the incoming service. This is not a luxury, but a necessity in even the smallest studio.