I have 20g long tank that I want to add some low light plants to. I think 24-34w PC would be enough for my tank. I know nothing about putting together a lighting fixture! I have a glass top on my tank now, and I would like to make something myself to go on top, rather than buy one of those expensive hood units. Is it feasible for me to do this? And can someone tell me what parts I need to buy and what I need to do? Thanks! 8)