Does that type of CFL use a mogul socket? I don't think that style is for standard socket, maybe wrong. I am using the larger CFLs with a standard socket w/ a clamp on fixture. My opinion is with clamp ons, you place the light high or low onto the plants. CFLs are the way to go for tight grow area's. HID HPS and MH are to damn hot, yet they say they are the best lights to go with, I disagree, try to locate a HPS along the sides of the plant, in-between the plants, using CFLs, now that is getting the light to them. I am waiting for that super CFL that is to be out soon, possibly by the fall 2010. Good Luck on your grow...