Saggy plants at end of light cycle

I have been growing a few years, and have been doing these Lavender,GDP,and Purple Kush strains for 10 months (4 grows). I transplanted them from 1 gallon pots to 4 gallon pots a week ago, using promix and plain water with a little mollasses(3/4tsp per Gal). I have the lights(600w and 1000w) 3 and 3.5 feet above the plants. In the begining of the light cycle they look fine but towards the end of the light cycle the plants are looking saggy and limp. I have no clue why this is happening, does anybody have any ideas? Thanks, djarjun422.

 

Look at some of the leaves, do they appear to have turned away from the light? If yes then they are trying to limit the amount of light being received. 1600 w is f**king bright . I would raise the lights 6" and see if it takes longer (if at all). That and check what temp the room is when they have sagged.

Ventilation is important, make those leaves jiggle. With alot of light the girls are wanting to transpire as much as they can.

Are these girls just starting in your flowering area? If so they might take a bit to get used to it. Going from say 400w to 1k w can be a lil overpowering at first.

 

The leaves aren't turned they are just sagging. The temp is about 55F lights off and 65-70F lights on. humidity is 38-52%. I have 40 plants under 2 600w and 1 1000w hps they were under T5 flourocents until i transplanted. They are on 18 hours off 6. Does it sound like to much and to bright of light to soon, even though they are 3-3.5 feet away from the plants?

 

mine is in a areo-garden and at nite it droops but comes back up when the light is back on........i think its sleeping.lol

 

It does seem like they are just getting used to the lights. 2200 watts of HPS vs the flos is quite a jump. They should adapt after awhile.