I've used these lights a couple of times. They get hot, off course because it is both UVB and heath, but they're only really suitable in high enclosures. The reason I don't use them anymore is that they only work for about 3 months! You have to replace them very often. I also heard that they lose their UVB output quickly. So therefore it is a good thing to replace them often, but then financially it is not a very attractive light to use
;-).