condition mean min max 4 h after light 390.9 390.9 390.9 8 h after light 294.15 291.7 296.6 12 h after light 287.95 247.2 328.7 4 h after dark 545.5 332.1 758.9 8 h after dark 581.05 539.9 622.2 12 h after dark 456.65000000000003 329.1 584.2