condition mean min max 4 h after light 9.3 9.3 9.3 8 h after light 17.55 10.6 24.5 12 h after light 12.95 11.0 14.9 4 h after dark 13.45 9.6 17.3 8 h after dark 12.850000000000001 7.6 18.1 12 h after dark 13.75 11.7 15.8