condition mean min max 4 h after light 3.1 3.1 3.1 8 h after light 5.300000000000001 4.2 6.4 12 h after light 5.75 2.2 9.3 4 h after dark 6.0 5.7 6.3 8 h after dark 3.45 2.6 4.3 12 h after dark 2.6 2.0 3.2