condition mean min max 0 h after light 3.94675 0.0 7.8935 2 h after light 0.0 0.0 0.0 4 h after light 3.59371 0.0 7.18742 8 h after light 0.0 0.0 0.0 12 h after light 3.68215 0.0 7.3643 2 h after dark 7.5488 0.0 15.0976 4 h after dark 3.523685 0.0 7.04737 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0