I like the heat cable the best. you can tape different amounts on different parts of the bottom of the enclosure to get every inch perfect. I also have a thermostatically controlled snake room, so my room temps don't fluctuate more than two degrees ever. I also use a dimmer type device to control my cage temps. I like this method because I can control individual cages temps and get them all perfect. this is on larger display type cages. I also use the heat cable on my racks and use spyder robotics herpstat 4s. they are not cheap, but they are awesome. you can buy the dimmer type rheostats for about thirty bucks I believe...and thermostats are going to cost a little more, but I would recommend them over a rheostat unless your room temps do not fluctuate much. I make all of my own dimmers from stuff I buy at home depot or lowes. I have used them for probably fifteen or more years and never had a failure yet...but if you do this, make sure you get someone who knows how to do it, or an electrician to help you....and use the wire caps AND electrical tape over top of those....do it right, or you could burn down your house. good luck and do some research and you can find a lot of great methods and equipment to properly get the job done.