condition mean min max 4 h after light 6.439795 5.83688 7.04271 8 h after light 6.995805 6.50017 7.49144 12 h after light 12.1381 12.0398 12.2364 4 h after dark 12.197666666666667 10.749 13.8151 8 h after dark 9.550379999999999 8.67874 10.4583 12 h after dark 8.160596666666667 7.96197 8.28159