I have looked into the sundials, not particularly what I was hoping for. From talking with random people about lights/brands rumor has it that coralife is going out of business unless they were mistaken . Tek lights appear to work well, just where my tank is located I can't have fixtures hanging from the ceiling which is unfortunate. So I was also recommended Aquaticlife brand along with the nova extreme, and by the looks of it they are worth the $. Does it matter if the lights are TOO powerful for the tank, wouldn't it work just as good if not better?