what can i put a 400w sunmaster bulb in

I have a 400w sunmaster bulb i want to use but i cant find anything that takes that size bulb the end is bigger then a standard bulb any ideas anything cheap i can buy i went to home depo an bought an out side light thats metal halide that u would put on yur buliding outside thinking i could use this sunmaster bulb but the homedepo unit took the regular standard size end so i just figured i use that for now it cam with a 100w bulb is that good i also have 2 100wcfl 27k an one 60w 27k in there also i that good for three plants when they are done im gonna put 10 random starters an 5 aurora plants i just started can i still use that same set up just change the light cycle or should i get different bulbs