no u cant put it in regular lamp. u have to buy a 400W MH ballast for a 400W MH bulb. the best thing to do is to buy the complete system which has the reflector, ballast and everything else u need. check out
Grow Lights, Advanced Nutrients, Hydroponic Supplies and more at Hydroempire.
they have a great selection and the best prices. i bought my 600W HPS system there. MH bulbs and HPS are called HID and require a special ballast in order to ignite and run them without exploding (or so i have read). they are hella bright though and work great for growing.