condition mean min max 0 h after light 7.78327 7.63469 7.93185 4 h after light 5.772065 5.71481 5.82932 8 h after light 6.53675 6.18677 6.88673 4 h after dark 7.06121 6.45436 7.66806 8 h after dark 6.851554999999999 6.8411 6.86201 12 h after dark 7.02919 6.80273 7.25565