condition mean min max 0 h after light 6.886855000000001 6.35902 7.41469 4 h after light 7.35236 7.08312 7.6216 8 h after light 6.914440000000001 6.91009 6.91879 4 h after dark 10.7148 10.5045 10.9251 8 h after dark 11.31685 11.1996 11.4341 12 h after dark 7.28683 6.68362 7.89004