I've used Workhorse ballasts for ~15 years. They are absolutely awesome. The wiring with a Workhorse ballast is usually much simpler than other ballasts. Just one lead to each end of the tube. The two pins are jumpered. This also makes it easier to connect the ballast in-line, external to the light fixture, thereby reducing the heat in the fixture and over the aquarium. Lower heat leads to longer bulb life.
Aloha