Ya, Home Depot has an industrial worklight from Lithonia Lighting called Black Sterling. It's 4' long and nice looking. It hangs from 2 hooks in the ceiling. Have a thin sheet of plastic cut for the underside to protect from water and voila. Like $45.00 and you get to choose the tubes. They are T8, I think.
Guess I should read more... it doesn't sit on the tank, ovbiously.