Burnt top leaves?

Ok so I'm new to cannabis growing but have a good grasp on horticulture. Got one random seed from a friend planted it and did amazing turned out to be female. Now I just installed my 150w hps, and did not set it at the proper hight I would say 3-5 inches for 3 light cycles and some of the top leaves turned crispy. Should I be concerned, scrap it, or just roll on. I moved the hight to near 8" now.

you've done what you can do. it wasn't smart having it so close before but you've rectified the problem. i'm sure she'll be fine