condition mean min max 4 h after light 259.2 259.2 259.2 8 h after light 132.4 69.8 195.0 12 h after light 60.5 46.2 74.8 4 h after dark 85.35 72.8 97.9 8 h after dark 253.25 71.2 435.3 12 h after dark 519.95 334.0 705.9