To be honest with ya the new light I have now has the new Evo Samsung diodes and also a little uv in it. I placed mine 28" above canopy and started frying them at 70% so I backed down to 60% (in flower). I could not go any higher I ran out of room lol  .you realize the light we see is not the light the plant receives.  You are right , I have 730w and this bitch will fry an egg lol  I am gun shy.