im looking for a t-5 fixture for a 40gal regular tank. it will be set up in my classroom and then moved home and back again during the summer. eventually it will be used as a frag tank too. should i get the giesman 4x39-36'' or the sun supply tek 4x39-36''? i like the looks of the mounting hardware for the sun supply tek. i cannot hang the light so i must mount it to the tank.