the UVB is as high as 38o /- in the afternoon . he goes out into that very rarely . usually he suns mid-morning when its under 200 MW of UVB . But he will bask at the high temps and UVB for a few minutes on and off during the day . I spend hour out there with him watching him come and go . just to see what he likes and what he does not . I bet i spend 30 hours a week with him .