I was very unhappy with lack of intelligent answers from HTG.
That aside, led tech is changing rapidly due to improved efficiency of CREE Neutral White LEDs. These will be game changers, and are being proven by several DIY growers. They can be used from cradle to harvest, but during flower we need 660nms which they barely touch, so the fixture should be ! 10% 660s, but on a separate circuit/timer
You could get 4 solderless DIY kits (@~125w) from say rapidled. Multiple fixtures provide a safety net