Ok, this may seem like a silly question. I was gonna go with the reptile basic rack, but i thought it might be fun to try to build a rack myself seeing as I've never built anything before. So I decided to go with the same tubs, the Iris MCB L 30 qt, and I have been all over town looking for them. The only ones I have found were at office max, but they are bright blue! I think I'll just order them from reptiletubs.com, but is there anything wrong with a colored tub? Could the total lack of light have any effect on snakes?