Quote Originally Posted by kitedemon View Post
Aside from this the use of fluorescent lights add to ambient air temps in a real and recognizable way. This aids thermoregulation. They are far cheaper than some of the alternative and in my current testing more effective.
Sometimes a little too well, I'm probably going to have to replace the tubes with LED tubes like these during the peak of the summer so my cages ambient temp doesn't hit 90...

http://earthled.com/flseries.html

But during the winter they do help keep the ambient a few degrees warmer (in my 1 foot tall cages, the effect isn't as noticeable in my 2 foot tall cage)