condition mean min max 4 h after light 15.661000000000001 15.0361 16.2859 8 h after light 11.07025 10.8806 11.2599 12 h after light 13.747700000000002 11.3223 16.1731 4 h after dark 20.241633333333333 19.7486 21.1623 8 h after dark 19.409433333333332 16.0958 22.2299 12 h after dark 17.282933333333332 15.2517 19.2488