stopped fattening up

[tyco118]

hey guys im in week 8 but about two weeks ago i noticed that everytime i went in there they looked the same at first it was my imagination but i have autos that i planted 2 weeks after these and they are getting bigger then the ones started b 4 them. i have harvested autos a bunch of times and this is my favorite time of the cycle when everytime i go in there its supposed to be like wow u girls are so fat but instead im like wow wtf. the buds used to be hard and now there getting soft, ffof soil, AN connoisseur nutes but just switched to over drive. 3 600 watt hps lights but there dimmed to 300 watts each. is there anything i can do to save my baby girls ? (if u need to know anything els just ask) wll upload pics as soon as i can, theres some yellowing going on on some of the girls but some are completely green, strains are purple cheese, bluematic and northern lights. thank you guys ,