condition mean min max 4 h after light 454.1 454.1 454.1 8 h after light 425.7 423.5 427.9 12 h after light 437.9 394.0 481.8 4 h after dark 389.85 361.0 418.7 8 h after dark 327.25 284.4 370.1 12 h after dark 223.7 217.7 229.7