condition mean min max 4 h after light 11.1497455 10.838762 11.460729 8 h after light 9.533114 9.001539 10.064689 12 h after light 9.778644499999999 9.769827 9.787462 4 h after dark 8.8080105 8.598557 9.017464 8 h after dark 9.169938 9.017464 9.322412 12 h after dark 7.986423 7.986423 7.986423