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.