condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.5623633333333333 0.0 1.68709 8 h after dark 0.221514 0.0 0.664542 12 h after dark 0.0 0.0 0.0