condition mean min max 4 h after light 4.872915 4.74475 5.00108 8 h after light 6.264115 5.04361 7.48462 12 h after light 5.270485 4.19823 6.34274 4 h after dark 11.024866666666666 10.6647 11.4468 8 h after dark 6.06062 4.30582 7.03065 12 h after dark 4.10258 1.82634 6.5035