Question about dimmers

Hey everyone, just a question...this might sound dumb, but...

I'm using an UTH for the warm side of my glass enclosure for my BP and it's doing great at keeping a good temp, but it's always warm here in the summer, so come winter time I might have to use a lamp for supplimental heat to keep the ambient at a good temp. Here's the question...where the hell do I get a dimmer for the lamp? See I'm thinking like a hardware store, but then I don't exactly know how to rig that up to use on a lamp...
Any input is helpful. Instructions are even better...haha.
Sorry if this is an obvious no-brainer.

Thanks guys! :)

They have plug in lamp dimmers at home depot or lowes. They are NOT the ones that get set in the wall. It should be in the same section as the lamps, and come in a little plastic "box" that says "lamp dimmer". I had trouble finding one when I got it.

Edit: Here's a link!
http://www.homedepot.com/h_d1/N-5yc1...atalogId=10053

Thank you sooo much. That's what I was hoping it was, it only made sense.

HD sells leutron & levitron lamp dimmers, loacted on the electrical aisle.