condition mean min max 4 h after light 13.1553 11.8929 14.4177 8 h after light 14.2909 13.5342 15.0476 12 h after light 13.5244 13.407 13.6418 4 h after dark 15.77695 15.4242 16.1297 8 h after dark 15.00225 14.7563 15.2482 12 h after dark 14.80765 14.5195 15.0958