condition mean min max 4 h after light 95.6 95.6 95.6 8 h after light 95.35 87.9 102.8 12 h after light 100.85 95.5 106.2 4 h after dark 112.65 95.7 129.6 8 h after dark 128.0 127.6 128.4 12 h after dark 178.4 156.8 200.0