condition mean min max 4 h after light 2.5 2.5 2.5 8 h after light 5.35 4.8 5.9 12 h after light 3.95 3.6 4.3 4 h after dark 6.1 5.3 6.9 8 h after dark 6.3500000000000005 4.4 8.3 12 h after dark 5.699999999999999 4.1 7.3