condition mean min max 0 h after light 13.9269 13.5829 14.2709 4 h after light 16.42515 15.8653 16.985 8 h after light 20.933100000000003 20.234 21.6322 4 h after dark 23.6356 23.5192 23.752 8 h after dark 19.8293 18.2717 21.3869 12 h after dark 14.402249999999999 13.9165 14.888