After some research on cheap CFL options. I have found a few socket cords on amazon for roughly 15 bucks which should work. I was also thinking of getting a twin light socket adapter to plug to this socket cord so I can put 2 CFL's on this. Or would I need 2 of these setup?

Can I get more info on the heat associated with CFL?
What wattage will I need overall for 2 plants?
Also, is it safe and fireproof to put 2 cfl on one socket with this adapter?

Will this be enough for 1-2 plants.

I figured out that my space with be roughly 30inches high and 30 inches width.