Bud, your plants are fine. My plants for the majority of my growing experience would droop after about 10 hours of lights on and would stay droopy during lights off, but would perk up about an hour or two before lights on, as if they knew the light was coming.
What medium are you growing in? It looks dry, but either way I'd water to some runoff.
IMO its your light causing the trouble. Either lower the amount of hours the light is on or raise your light up. Is it an LED? I'd raise your temps if it is, if possible.