hey. I bought a 400w HPS bulb and a 50w HPS bulbs. But, I have nothing to screw the bulbs into. (no fixture) how much to fixtures cost? Could I use a regular house lamp for the 50w bulb? Since it has a lower watt than a normal light bulb, shouldnt the lamp be able to handle it? I just really wanted to know how much light fixtures were. Hope it's not too much.