condition mean min max 4 h after light 406.4 406.4 406.4 8 h after light 383.1 356.2 410.0 12 h after light 404.7 385.0 424.4 4 h after dark 393.1 392.2 394.0 8 h after dark 360.05 295.5 424.6 12 h after dark 308.75 307.6 309.9