condition mean min max 4 h after light 1.4 1.4 1.4 8 h after light 21.15 17.3 25.0 12 h after light 16.7 11.9 21.5 4 h after dark 10.049999999999999 1.4 18.7 8 h after dark 0.9 0.7 1.1 12 h after dark 11.100000000000001 3.6 18.6