Question about building a tub

[Tiny_loves_Roxanne]

alright,so I'm going to build a tub for my python and i'm following the instructions i found here (unless anyone has a better one)

here is the link YouTube - How to build a snake tank


but my question is at the end of the video,he has a lamp over the tub, i thought with a tub only the UTH was necessary?

anyone feel like clarifying for me?


thanks much

-Tiny