Musk turtles need lower levels of UVB than many other aquatic turtles. They also tend not to bask as much. I use a T5 HO with a 5.0 zoomed UVB bulb for my musk turtles.Hi. I’m soon going to purchase a pair of razor back musk turtles. I’m not sure how to provide UVB light. Is a mercury vapor or linear T5 HO appropriate?