Great questions....the majority of growers run the lights at 24-36" during veg and anywhere from 25-100% output. For flowering, most growers lower the lights to 12-24" above canopy @ 100% output.@RainDan Mind sharing a little info on optimal light hanging height? Seedling, veg and flower? Do you recommend moving the height up and down or dimming?
To your point, some growers prefer to use the dimmer, others run 100% and just use height above canopy to control the intensity...others use a combo of both.
I have heard good results reported with all methods listed.