condition mean min max 4 h after light 572.0 572.0 572.0 8 h after light 521.3 506.2 536.4 12 h after light 483.7 358.4 609.0 4 h after dark 362.1 331.9 392.3 8 h after dark 398.1 335.1 461.1 12 h after dark 606.7 526.4 687.0