Another lighting Question >.>

Guys, I was looking to buy some hps lights. I need to know if I can buy some 150w hps bulbs(without the ballasts) and just screw it into the same type of the sockets my cfl's use.
Might be a stupid question to some, but i really have no idea.

If its not possible to do this with a 150w, can i do it with a 75?


Any info will help thnx

an HPS bulb needs a ballast.
a MH bulb needs a ballast.
the cfl's have a built in ballast.