ive decided to use the 150 and 200 watt cfls my question is will i need a balast? can i just screw these into a light sockt and flip the switch?
I believe you can, some do need certain sockets. Did you already buy them? Read what kind of mogul socket they need.
Most of the CFL's over 55 watts have a built in ballast thats if they have a "Medium" standard household socket