condition mean min max 4 h after light 3.8 3.8 3.8 8 h after light 5.800000000000001 4.2 7.4 12 h after light 7.9 6.3 9.5 4 h after dark 8.55 6.4 10.7 8 h after dark 19.4 7.4 31.4 12 h after dark 4.9 3.4 6.4