condition mean min max 4 h after light 1.8 1.8 1.8 8 h after light 3.4000000000000004 1.9 4.9 12 h after light 5.6000000000000005 1.8 9.4 4 h after dark 23.65 22.1 25.2 8 h after dark 2.55 2.1 3.0 12 h after dark 20.65 2.0 39.3