You're thinking of UVB lights (usually for lizards like bearded dragons). Many people just prefer the more natural "daylight" of full spectrum lights...it's as much for
you* as any pets...just better lighting since you said there's no windows. (*In the winter, many ppl experience "SAD"...seasonal affective disorder when there is a
reduction in natural sunlight. https://www.mayoclinic.org/diseases-...s/syc-20364651 -I had a friend that had that.) FYI, many snakes know it's time to hibernate by not only the falling temperatures, but by the shorter daylight, so if you're trying to keep all your snakes eating well, it seems worthwhile to consider full spectrum...or if you want to have some houseplants in there too.