condition mean min max 0 h after light 9.555265 9.2521 9.85843 4 h after light 9.40596 8.95621 9.85571 8 h after light 13.3794 13.231 13.5278 4 h after dark 12.4573 12.2258 12.6888 8 h after dark 10.06806 9.44352 10.6926 12 h after dark 9.00664 8.3997 9.61358