I needed to replace 3 old standard ballasts (806-BR-TC-P) in some 8" lights in my garage and opted for the newer electronic version. These worked great! They came with instructions but they weren't really needed. The circuitry on the device is all you need. I cut the wires from the old ballast near the ballast itself and remove it with a socket nut, then I put a new one in with the same nut as the length of the new and old ballast is the same. Then I cut the old wire so it was about 10 inches long and made sure one set of tombstones were independently connected and the other side tombstones were shorted. I used wire nuts to attach the new wires to the old ones, returned the caps. and installs the bulbs. Pretty easy. Note: you may need extra nuts to do this job.