Thanks Mike! So you're saying that if I run 2 bulbs on each Work Horse 5 they
will be over-driven? If I run 3 bulbs on each Work Horse 5 they will not be over driven. Correct?
I have wired up the Tek Retrofit kits before, so I have an idea what to do. I can follow wiring diagrams. I like your idea with grounding the reflector - I did get a "tickle" from touching the reflector and water at the same time.
How much are these end caps you have? I will be needing 8-12 of them depending if I decide to run 4 or 6 bulbs, so finding a good source would be great!

I'm going to put a Reef Brite XHO strip down the middle of the fixture too. I have an Aquatic Life hanging kit with the "arms" coming over the top (instead of hanging from ceiling). I will finish by installing a "wrap" instead of a canopy that can easily be slid off the front for tank maintenance. I'm hoping for a nice clean look with some big PAR.