Ok. So I had some time to look at this tonight. I now understand the basics of this mod. In my standard setup, one ballast powers two lights in a series circuit. Now you may be asking yourself; what did that last sentece say? I'm here to break it down. A series circuit is like Christmas tree lights; one bulb goes out and they all do. In this configuration, the voltage or potential of the power source is split among the two lamps. By rewiring the ballast to power one light, the one lamp sees the full voltage potential of the power source. So comparing a high output to a stanard bulb, I have these stats (measured in watts and lumens because I don't have any other metrics).
Standard = 13 watts, 1350 lumens, 104 lumens/watt
High Output = 24 watts, 2000 lumens, 83 lumens/watt
Numbers for 21 in T5.
Seems slighly less efficient using this method, though I think luminosity varies between bulb manufacturers. I think the big advantage is the space savings.
Here's my plan going forward; I have 2 identical fixtures. I'm putting both ballasts in one fixture to make it a HO two lamp fixture. The other fixture will be a pile of metal. I'm going to put the supercharged fixture in my flower room. Since I will need new bulbs, I'm going to get some aquarium lights I mentioned previously in this thread.
Here are a few pics I took to document the light upgrade.
This is the light fixture I'm starting with.
Here it is turned on.
This is the original wiring configuration. 2 blue wires connected to one socket and 2 red connected to the other.
I have room for a second ballast.
The wiring diagram was right on the ballast.
A red and a blue wire on each socket. Unfortunately, I don't have the wire to attach the other socket. I'm getting wire on Sunday and ordering bulbs now. Will update when there is more news.
Thanks for reading.