condition mean min max 4 h after light 8.2964425 8.275148 8.317737 8 h after light 7.333162 6.668093 7.998231 12 h after light 7.559817499999999 7.478418 7.641217 4 h after dark 7.4911725 7.085518 7.896827 8 h after dark 7.9962165 7.653872 8.338561 12 h after dark 6.979431 6.979431 6.979431