condition mean min max 4 h after light 483.7 483.7 483.7 8 h after light 451.4 408.8 494.0 12 h after light 463.25 429.3 497.2 4 h after dark 475.7 450.2 501.2 8 h after dark 450.35 418.1 482.6 12 h after dark 437.25 386.8 487.7