condition mean min max 4 h after light 7.673695 7.369084 7.978306 8 h after light 8.047508 7.99116 8.103856 12 h after light 8.428923000000001 7.978306 8.87954 4 h after dark 7.87747 7.776634 7.978306 8 h after dark 7.954122 7.461498 8.446746 12 h after dark 7.978306 7.978306 7.978306