condition mean min max 4 h after light 569.5 569.5 569.5 8 h after light 566.15 492.2 640.1 12 h after light 683.05 484.5 881.6 4 h after dark 712.6 697.6 727.6 8 h after dark 698.95 585.8 812.1 12 h after dark 600.25 550.0 650.5