condition mean min max 4 h after light 399.4 399.4 399.4 8 h after light 486.05 478.0 494.1 12 h after light 493.5 436.3 550.7 4 h after dark 459.2 444.9 473.5 8 h after dark 469.25 457.8 480.7 12 h after dark 415.75 368.7 462.8