for a 25 - 30 gallon tank you NEED a UVB light that is separate from the heat source so you will have a minimum of 2 lights. You need to have a long tube UVB florescent light, a ReptiSUN 10.0 in the US or an Arcadia 12.0 in the UK, as far as I have read (and I have read A LOT) these are the only...