condition mean min max 3 h after light 1.5101296666666666 0.58436 3.20219 6 h after light 2.34197 1.14363 4.40714 9 h after light 13.24378 8.38201 21.6279 12 h after light 101.3197125 7.11585 147.977 3 h after dark 156.93 138.463 167.113 6 h after dark 159.341 145.511 183.622 9 h after dark 75.9638 69.75 79.4717 12 h after dark 7.052375 5.95907 8.14568