condition mean min max 4 h after light 6567.4 6567.4 6567.4 8 h after light 6591.65 5889.4 7293.9 12 h after light 5700.0 5124.3 6275.7 4 h after dark 4267.0 3268.3 5265.7 8 h after dark 3415.3500000000004 3116.4 3714.3 12 h after dark 4284.3 4070.1 4498.5