condition mean min max 4 h after light 100.4 100.4 100.4 8 h after light 64.5 57.7 71.3 12 h after light 122.15 99.4 144.9 4 h after dark 118.0 109.4 126.6 8 h after dark 146.05 145.9 146.2 12 h after dark 134.15 97.5 170.8