condition mean min max 4 h after light 791.6 791.6 791.6 8 h after light 650.55 553.7 747.4 12 h after light 522.5 409.0 636.0 4 h after dark 474.8 420.5 529.1 8 h after dark 562.55 562.5 562.6 12 h after dark 484.4 458.2 510.6