condition mean min max 4 h after light 739.4 739.4 739.4 8 h after light 731.55 730.2 732.9 12 h after light 692.45 520.8 864.1 4 h after dark 1018.45 952.0 1084.9 8 h after dark 1220.0 1188.5 1251.5 12 h after dark 1242.4 1011.7 1473.1