condition mean min max 0 h after light 177.3875 173.026 181.749 4 h after light 103.0324 84.2548 121.81 8 h after light 53.0487 46.5726 59.5248 4 h after dark 70.4131 50.8893 89.9369 8 h after dark 95.0488 86.1646 103.933 12 h after dark 273.993 249.123 298.863