I am in the process of making a bioactive terrarium for my 4 year old ball python, But ive run into a bit of a problem. The tank I purchased was secondhand, and its an odd shape that i cant seem to find a lid for (not too big of a problem, I can make my own) but I cant find a proper sized radiant heat panel or lights for the plants I plan to have inside. Id love any advice you have to offer, I dont want to do something wrong and possibly put my snake in danger or spend a large amount of money on something thats completely wrong!

The dimensions of the tank are 15" wide, 72.5" long, and 18.5" deep, measured from the edges. On the top middle there is a platform (?not sure what to all it) thats presumably used to hold up the lid(s) or lighting fixture.

My basic plan is hydroballs for drainage, then weed mesh, then mix of topsoil, coconut husk substrate, and forest floor substrate. Plants i plan to use are pthos, ferns, and moss. I plan on having faux vines as well. For CUC, springtails and isopods. Also using grapevine for some decoration/enrichment and I have multiple hides and a large water bowl already. (this is very simplified, im just trying to give a basic idea of what ill have in the tank)

Ambient temp of the room is 70F, high of 80 on a warm summer day and low of 60-55 on a cold winter day. Whole house is temp controlled so highs and lows are rare.

Here is some pictures of the tank



Thanks in advance!