condition mean min max 4 h after light 10.5 10.5 10.5 8 h after light 6.3 5.6 7.0 12 h after light 8.100000000000001 6.4 9.8 4 h after dark 4.85 3.7 6.0 8 h after dark 6.6 6.2 7.0 12 h after dark 2.55 2.2 2.9