condition mean min max 4 h after light 412.6 412.6 412.6 8 h after light 402.3 399.6 405.0 12 h after light 457.75 379.4 536.1 4 h after dark 423.65 376.2 471.1 8 h after dark 363.2 336.5 389.9 12 h after dark 386.7 370.5 402.9