condition mean min max 4 h after light 91.6 91.6 91.6 8 h after light 65.4 54.4 76.4 12 h after light 114.1 98.1 130.1 4 h after dark 92.85 73.0 112.7 8 h after dark 59.35 48.0 70.7 12 h after dark 59.05 45.0 73.1