condition mean min max 4 h after light 4.37477 3.53203 5.21751 8 h after light 9.719370000000001 9.20654 10.2322 12 h after light 11.8529 11.0975 12.6083 4 h after dark 13.6357 13.4954 13.776 8 h after dark 8.512065 8.2535 8.77063 12 h after dark 7.572775 7.15741 7.98814