condition mean min max 4 h after light 666.2 666.2 666.2 8 h after light 386.4 374.2 398.6 12 h after light 464.3 372.1 556.5 4 h after dark 525.1 479.2 571.0 8 h after dark 576.9 415.0 738.8 12 h after dark 606.1 592.1 620.1