Looks amazing, Ross! Congratulations on the new house and new tank build. I keep a large reef in my basement and use 400 watt halides, which supplement heating the water as well. It would not be cost effective to run LED lights in my basement because without the halides, I would need to add a lot more heaters to my system just to keep the system warm enough.
I noticed you mounted your halide ballasts directly to your I-beams. Just a suggestion, but those halide ballasts can run very hot at the end of the day and the materials used to construct those I-beams on your house consists of flammable glues pressed into the wood. It could be a potential fire hazard. I mount my halide ballasts using unistrut attached to my I-beams (see attached pictures). Hope this helps you.
Amazing work !!!