condition mean min max 4 h after light 145.2 145.2 145.2 8 h after light 118.65 78.0 159.3 12 h after light 115.1 102.7 127.5 4 h after dark 180.55 116.3 244.8 8 h after dark 199.75 136.7 262.8 12 h after dark 118.65 95.3 142.0