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 0.0081823 0.0 0.0163646 4 h after dark 0.0 0.0 0.0 8 h after dark 0.00710475 0.0 0.0142095 12 h after dark 0.0 0.0 0.0