condition mean min max 4 h after light 168.5 168.5 168.5 8 h after light 99.55 29.1 170.0 12 h after light 83.15 20.3 146.0 4 h after dark 64.3 19.8 108.8 8 h after dark 15.55 11.3 19.8 12 h after dark 63.699999999999996 12.8 114.6