condition mean min max 0 h after light 9.288735 8.86456 9.71291 4 h after light 11.940750000000001 11.7443 12.1372 8 h after light 11.97895 10.1405 13.8174 4 h after dark 15.81265 14.9637 16.6616 8 h after dark 10.405395 9.07919 11.7316 12 h after dark 9.69436 8.02272 11.366