Made this out of a spent Sunpark 20 watt compact fluorescent lamp. The CFL's own ballast was retained and used to operate the 18 watt Philips SOX-E lamp.
traffic light 1, I know it is under-driven with the Sunpark 20 watt CFL but I used this particular CFL as it could be taken apart easily without cutting anything (the lamp snaps apart vs being glued) plus the bulb part was already spent.
I have a board from a 25 watt Buffalo CFL that works very well (appears to overdrive slightly) but I haven't tried to see if it would fit in place of the Sunpark.
I have a board from a 25 watt Buffalo CFL that works very well (appears to overdrive slightly) but I haven't tried to see if it would fit in place of the Sunpark.