condition mean min max 4 h after light 519.4 519.4 519.4 8 h after light 449.5 398.0 501.0 12 h after light 298.05 169.1 427.0 4 h after dark 388.7 168.0 609.4 8 h after dark 488.0 376.4 599.6 12 h after dark 344.2 270.2 418.2