Yes, but these will also not receive directed heat. Only ambient heat will reach the sides/top, which will be below 100F. I would think that even in the more southern states where temperatures reach above 100F, these products are used and tested. I would imagine "excessive" temperatures to be probably 115F or greater (just my opinion) so I would assume that an ambient temp in a portion of the cage being 95F ambient is no issue, especially being the bulbs are not facing the sides or top.