condition mean min max 4 h after light 4.8 4.8 4.8 8 h after light 12.25 6.2 18.3 12 h after light 5.3999999999999995 2.6 8.2 4 h after dark 6.1 5.7 6.5 8 h after dark 9.55 5.7 13.4 12 h after dark 5.550000000000001 4.2 6.9