condition mean min max 4 h after light 901.0 901.0 901.0 8 h after light 866.65 824.5 908.8 12 h after light 784.95 737.9 832.0 4 h after dark 1195.15 847.1 1543.2 8 h after dark 1099.4 968.0 1230.8 12 h after dark 921.0 885.9 956.1