I did some more measurements now the light was broken in and the bulbs roasted good.
I estimated about 1/2 the power: 50%, but this looked too high, so I measured and sure enough it was 140umol at the bottom of the 24" deep tank.
450 at the surface.
So now I dialed it down to 30%, or about 190 W over 180 Gal tank.
Still near 100 umol at the bottom.
360umol at the top
I had 45-50 umol with 4x 96W PC's.
I use 1/2 the energy and have 2x the light.
So 4x more light per watt.
ATI vs the The Tek was about 2X the light.
I have a much better color selection of bulbs, as well as more options(8 vs 2) and a much wider even spread of light.
Only saves me about 90$ a year, but the increased light = more plant growth= more plant trimming to sell= 400$ or so more a year I'd say.
So after 4 years, the light should pay for themselves.