condition mean min max 4 h after light 850.1 850.1 850.1 8 h after light 900.4 518.5 1282.3 12 h after light 408.70000000000005 287.7 529.7 4 h after dark 107.05000000000001 23.8 190.3 8 h after dark 91.9 71.0 112.8 12 h after dark 134.5 94.7 174.3