We've been in the process of having our basement redone, during which I've begun to doubt the sanity of our contractor.
He installed two dimmer switches, both of which control 480 watts worth of lighting (2 fixtures each, each of those with four 60-watt bulbs). He assures me the dimmer switch is up to the load, but when the lights are on, the metal conductor plates at the top and bottom of the switch are hot to the touch - not so much that it will burn you immediately, but if you hold a finger on it for 10 seconds, you'll have to pull it away.
This strikes me as a problem; him, less so. Anyone know for sure?