condition mean min max 0 h after light 39.9823 39.0955 40.8691 4 h after light 29.64415 28.1373 31.151 8 h after light 37.78875 37.7849 37.7926 4 h after dark 29.52015 28.4525 30.5878 8 h after dark 23.7907 23.2305 24.3509 12 h after dark 34.50045 34.0264 34.9745