It doesn't look like leaf burn, but do you really have a 1500w lamp? Can you fill out your nutrients, ph, tds and other info? Do you have a fan blowing gently over her top? How did you get this strain?
So seriously, how did you get this strain? I have watched 2 documentaries on this. I never heard of it (seeds) being for sale, so I'm curious? I have seen the Stanley Brothers talking about it, with only .3% thc, and gobs of CBD. Very curious?
If she is really at the top, you might need to take the hit and bend her at like a 60 degree angle. I had to as I had a micro grow, done right it will prolong the grow but it's better than burning her up on the light.