condition mean min max 4 h after light 246.8 246.8 246.8 8 h after light 220.45 197.5 243.4 12 h after light 353.25 264.0 442.5 4 h after dark 389.45 374.2 404.7 8 h after dark 544.45 528.5 560.4 12 h after dark 466.6 395.5 537.7