condition mean min max 4 h after light 1.1 1.1 1.1 8 h after light 1.8 1.1 2.5 12 h after light 15.9 1.7 30.1 4 h after dark 10.4 4.5 16.3 8 h after dark 15.950000000000001 11.8 20.1 12 h after dark 10.15 4.4 15.9