I'm no electrician but that's not correct. First, what gauge wiring is ran to the lights. Second what average fuse is the line ran off of. Third, is there anything else sharing the lights with that fuse?

Those questions aside many companies recommend a max number of lights per switch. For example, verilight says 10 led lights max.

I mentioned some things you didn't ask about because I was unclear who ran the electrical. And your knowledge about what's on the fuse they may share.

"NEW" Dimmer switches CONTROL THE WAVE FORM, they have nothing to do with amps or voltage directly.

So even if you can control 10 lights on 1 dimmer - it doesn't mean you should. You need to do your research and answer the things I mentioned in the first paragraph.

This may determine while the dimmer switch can control 10 lights, but electrical line or fuse may only handle 3.