condition mean min max 4 h after light 2905.7 2905.7 2905.7 8 h after light 3566.2 3219.5 3912.9 12 h after light 4009.2 3989.4 4029.0 4 h after dark 5144.05 4018.3 6269.8 8 h after dark 5137.85 3775.1 6500.6 12 h after dark 3397.75 2661.4 4134.1