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 0.586839 0.582628 0.59105 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0