condition mean min max 0 h after light 8.744715 7.69842 9.79101 2 h after light 11.96705 11.6093 12.3248 4 h after light 9.79867 9.08264 10.5147 8 h after light 12.1828 11.4904 12.8752 12 h after light 21.0464 18.6243 23.4685 2 h after dark 19.508000000000003 16.009 23.007 4 h after dark 14.898 13.7464 16.0496 8 h after dark 10.34197 9.04884 11.6351 12 h after dark 8.959315 8.25902 9.65961