Reddit reviews Black - 4 Foot Plastic Sliding Door Track

To piggy-back off of this comment, if you have a 130° degree basking spot in an all glass 36" tank, the cool side will never get cool enough to give your lizard a good temperature radiant. Side ventilation helps to keep a good temp differential and is easy to accomplish if you build your own wooden cage. Amazon sells sliding door tracks and you can get custom glass doors cut at any local glass shop. Also look into retes stacks.