I need to know the absolute cheapest way to light a 180 gallon 6 ft tank. I was going to buy 2 30 inch lights for it but I cant find any 30 inch lights under 40 dollars and i don't want to spend 80 dollars on lighting. So at way to light it for really cheap? Btw I don't plan on getting plants or anything I just need light to view the fish. Also if you know something I can buy to light it cheaper, please include links.