GreenWire recently just completed this project. We converter 52 carports that had 2 flourescent fixtures each with 2 tubes. We removed the ballast and the tubes and properly had them disposed. We then installed On-Q 16 watt T8 tubes into the existing fixture. We did all 208 tubes in two days. The customer is saving over 50% on electricity and enjoys 20% more light than before. The payback for this project was less than 2 years!