condition mean min max 4 h after light 538.024 505.216 570.832 8 h after light 657.2415 654.741 659.742 12 h after light 400.865 383.48 418.25 4 h after dark 289.53700000000003 269.944 309.13 8 h after dark 285.42 266.932 303.908 12 h after dark 334.295 326.382 342.208