condition mean min max 4 h after light 519.097 511.933 526.261 8 h after light 485.075 482.012 488.138 12 h after light 443.2025 438.784 447.621 4 h after dark 591.825 566.797 616.853 8 h after dark 626.2615000000001 607.4 645.123 12 h after dark 573.0754999999999 560.424 585.727