I don't know much about Current USA fixtures, but can tell you that I found Hamilton bulbs not that great.
I have a Hamilton Belize Fixture and it came with bulbs, the fixture is incredible, but the bulbs were not... Dim and yellow, I had the 10K's, very yellow compared to others.
So I changed them out for Ushio's, and they are so much better.
It is most likely not the ballast but the bulb's themselves.
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Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite)
Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 2x MP40W, 2X Koralia 4's Wavemaker
Lighting: 5ft Hamilton Belize Sun (2x250W MH, 2X80W T5HO)
Type of Aquarium: mixed reef (SPS & LPS) with fish
Dosing: Mg, Ca, Alk
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