basically im looking for a cheap way to install metal halides for my 55g. im in the process of making a canopy for it. so im looking for something to hang over the tank, from the top of the canopy. i was wondering what kind of fixture can i use. like can i use something as a simple clamp lamp? or can i make something? also i always had the question of can a metal halide bulb fir into a regular socket? but primarily looking to make or buy something for cheap to incorporate metal halides for my tank. thank you for any help...