My plants like to go droopy when lights are out, its fine. Shes just taking a nap. i was having the same problem as you and thought i was under watering so i started watering every day, which lead to over watering. Sometimes i go when lights are off and it looks like she is all dried up and begging for water, check the weight of the pot and its really heavy. Come back when lights are on and she is spruced up and looking cool as a cucumber .
They have really come along now so nothing to worry about as far as i know dude.