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Don't know what happened to my baby. It looks sad, isn't growing. New growth has a bit of yellow tone, veins are a bit red also. All other plants are ok 3 times size. I start my seedlings under cfl for 3-4 weeks, and just changed them to a 400w hps. Grow medium: golden label custom light mix...

I was wondering how much can a plant be affected, if it's on an 18/6 cycle and let's say that light go out now between 6pm, and 12am. You want to switch the to 12/12 cycle but have the lights out at different time, let's say 5am to 5pm lights out. Will this change in bio rythm or bio-clock...