I'm also using spiral CFL bulbs in standard screw fixtures. I have a pole lamp with 3 sockets, with reflectors. Plus one desk gooseneck lamp. Plus on clamp-on lamp with a gooseneck.
So I have up to 5 bulbs with reflectors aimed at a shelf where I start seeds. I think those bulbs are so-calledd "equivalent to 100 W incandescent". I'll look up their actual CFL wattage andd report back. I hate to take a photo becuase I currently have solme ugly insec t webbing there!
(I did this instead of hanging 48" tubes because I already had the screw-base lamps, can't climb ladders, and I'm suspicious of this manufactured home's roof's ability to support weight. If I got someone to mount shop lights, I might be abloe to adjust their height with a sstepping stool, a cane, and a lot of caution.),
One advantage of CFLs with reflectors on goosenecks or swivvels is that then you only have 1-2 trays,. yhou can aim ALL the bulbs at on e spot and get good intensity. People with 48" tuber fixtures might comnsider a few high-power clamp-on CFLs with reflectors for extra intensity if vegetables *for example) get spindly from weak light.
