i found these light fixtures at petsmart pretty cheap and would like to use them on my aquariums, because they'd be a lot cheaper than buying legit aquarium lights with the wattage i want, but on petsmart's website it says that they aren't for use over aquariums. i'd like to know why this is though because there doesn't seem to be any reason not to use them on aquariums unless it's the fact that they promote buying the special reptiles lights that fish probably wouldn't benefit from with it or because it doesn't have anything to go between the aquarium and the light, but wouldn't a plexi-glass/acrylic hood fix that?
http://www.petsmart.com/product/index.jsp?productId=2752557&ab=hp_ln_reptile
http://www.petsmart.com/product/index.jsp?productId=2752557&ab=hp_ln_reptile