condition mean min max 4 h after light 15.5582 14.5629 16.5535 8 h after light 10.454709999999999 9.26202 11.6474 12 h after light 14.0654 13.9783 14.1525 4 h after dark 17.417666666666666 16.2345 18.0392 8 h after dark 15.622366666666666 14.2233 17.0887 12 h after dark 17.2339 15.851 18.4738