yea just realized i would need at least 10"or more for just the reflectors..the problem is that most of the fixtured mentioned above are way out of my price range, there isn't a company that makes just the shell for a fixture? lol...i don't have enough skills to make it directly from metal as you mentioned..so thats why i got all excited when i saw this cheap fishneedit fixture...so the tek and sunpower would little more realistic pricing wise..other than those two, if i didn't go with something with parabolic reflectors, do u think i can pull of sps? tank is 18" deep, 4x39watt setup..Thanks