GG4 & sour diesel

All was going well, until I burnt the top leaves on the girls with the new light. I forgot to give them a conditioning period. So raised the light a bit and put on 75% power. Thats brought ppfd down from 750 to 550 in the centre. They are stretching like crazy. Need to flower 2 weeks earlier next time so maybe about 5 weeks veg 24.1.22 GG4 1 6.5 GG4 2 5L GG4 3 5.5 Sour 4L Week 3 flower with fish Silica 1.5ml. Calmag 1ml With 1ml extra Alg a mic 26.1.22 GG4 3 84cm GG4 2 73cm GG4 1 73cm 27.1.22 Gave all 5L each Week three flower with grow, Silica 1.5ml. Mammoth p. Recharge calmag 1.2ml ph6.3 a pop 29.1.22 Gg4 1 76cm Gg4 2 80cm Gg4 3 87cm Sour 54cm 600w light 40cm 3/4 power because I think the new light burnt top of plants gg4 only