Man wish I could help you there but I really can't. I've never use CFLs but there's a lot of guys on here that have. Maybe they can chime in and help you out
The light is small enough that if I need to, I can get another one later and run two. I'm hoping to get by on one. Will only be growing two plants at a time until I get the hang of this stuff.
I'm also planning on getting some CFLs for side lighting. I was going to go HID, but didn't want to deal with the heat.