plant drooping loads randomly - (pics)

Hi guys, here i have my 5 week 4 day old blue cheese plant. under a 600watt hps light, feeding them the bio-bizz range (bio-grow, bio-bloom, top-max)... watering them when needed (got a monitor and also i feel the weight) went into flowering 1 week ago (early i know but couldnt wait any longer lol) so they on a 12/12. they drooping loads randomly, especially when i turn light off, then they randomly all shoot back up again. this is weird dont you think? or normal? what could be causing this? thanks a lot for help in advance... GW

pics please, i just went through the exact same issue's with my babys

what temp is you grow area? keep it between 70F and 80F, and makes sure ur PPM and PH levels are in check, u might have light stress depending on the size ur growing in, post pics n it will help diagnose the problem

sorry lol, actually forgot to put them in the post. here is one