condition mean min max 4 h after light 1.6991999999999998 1.64349 1.75491 8 h after light 2.601465 2.43915 2.76378 12 h after light 3.0351 2.73158 3.33862 4 h after dark 4.388185 4.34238 4.43399 8 h after dark 4.785455 4.67474 4.89617 12 h after dark 3.32705 3.19719 3.45691