Plenty of light gets into the tubs...BP's don't need a lot of light to begin with. And with a tub (rubbermaid or sterelite or whatever) I would MUCH rather go with a UTH than a lamp. Since you have to regulate the temperature of the UTH to keep it from burning your snake, you also keep it from being a risk against the plastic...won't hurt it at all. If you use a lamp with a tub, you'll have to cut an opening out of the lid and cover it with hardware cloth or some sort of screening....big pain in the tushie, I would imagine, and would also likely defeat much of the benefit of having a tub in the first place.