Yes bro this is light stress, ive had top buds and leaves damaged like that when it was so close to my plants.it must have been very close during early stages,possibly during stretch.ive lost top buds because of that but yours look healthy and solid. Hps is too damn strong,watch the temps and light distance closely. Tou have a very positive energy, wishing you good luck.many others would shit their pants after seeing that damage (including myself)