condition mean min max 4 h after light 194.0 194.0 194.0 8 h after light 100.9 81.2 120.6 12 h after light 102.2 101.7 102.7 4 h after dark 125.3 93.4 157.2 8 h after dark 141.8 126.9 156.7 12 h after dark 160.9 157.8 164.0