Hey! I was here a few months ago asking questions about BP before I purchased. Well now I have the money to buy everything I need, but I'm still somewhat confused on what to get to set up a tank. Here's what I'm planning on getting:

(1) 20L Tank (glass terrarium with screen sliding/locking lid)
(2) UTH - one for the cool side and one for the warm side
(1) water dish - medium size
(1) package of Reptile Bark substrate
(1) tank decoration - I'm liking the look of the wood pieces
(2) plastic leaf tank decorations
(2) identical hides - the plain black ones from Reptile Basics seem to be where I'm heading

Now, I know I need a something to measure temperature and humidity levels, but I'm confused as to what exactly I need. I've heard the term rheostat, but am confused as to what it does/how to use one. I was reading that I need two clamp lights as well (one for daytime light/one for nighttime light) and a good way to manage all of it is a power strip with timer settings.

Now, do I need MULTIPLE thermometers/humidity gauges? Do I need multiple Rheostats?

I plan on doing the aluminum foil treatment to the lid to keep in warmth but I need to know if I need to leave holes for the two lights and ventilation.

If someone could help me out with clarifying the problems I'm having with understand measuring/sustaining temperatures and humidity.

Thanks!