I actually have a box turtle, but this section is more active and this is a non species specific question. I just got my boxy and he's but a wee las ( a yearling) so he's only a part-time outsider for now. On some days when I take him out to the pen for his daily dose of sun it's kind of cloudy outside. The question is, since they say you can still get sun burned on a cloudy day, does that mean my lil turtley can get his dosage of UVB rays while it's cloudy?