Now you are just pulling numbers and theory out of your ass. The sun puts out 30k lumens, cmon now. Per what, square inch, square foot, square mile, what?

Maybe it's heat burning the tops of your girls? 95 degrees has the capability to do that, especially if your canopy temp is higher. Why do you think mylar blankets are used for emergencies? The reflective side has the ability to reflect heat also, thus keeping us warm inside them. Maybe that's why the edges are browned too?

This is my problem with this claim of "light burn". The only time I hear people complain of it is when there are 3 other variables in their grow that are fucked up. It's never on a dialed in healthy grow that someone gets "light burn", or "light lockout" or any light issues for that matter. It sounds to me like many cases of poor troubleshooting.