This is is my first time grow and a i have 6 plant under a 600 hps light on a 12/12 cycle in a 1.2m square bud box. Due to my inexperience i did not research properly, i left them in the veg stage 18/6 under a 250w envirolight for 8 weeks, i have read up on it and you should only veg them for 4.5 weeks, will leaving them on 18/6 for 8 weeks affect my crop?