condition mean min max 4 h after light 90.8 90.8 90.8 8 h after light 109.1 89.7 128.5 12 h after light 86.9 83.3 90.5 4 h after dark 93.35 71.9 114.8 8 h after dark 58.65 42.7 74.6 12 h after dark 53.8 51.4 56.2