Beautiful and gorgeous Bci!!!!
Here's a link to Reptile Basics. Rich owns the business and he is a really great guy with very reliable and sturdy products and awesome customer service. He sells thermostats, cages, RHP's, flex, cages, racks, etc.
Here's the link to his thermostat page: http://www.reptilebasics.com/Thermostats-p-1-c-250.html.

I would not mess around with a dimmer at all-- go directly to a thermostat.