condition mean min max 4 h after light 4006.8 4006.8 4006.8 8 h after light 4201.5 3780.3 4622.7 12 h after light 3694.0 2739.2 4648.8 4 h after dark 3584.95 3041.1 4128.8 8 h after dark 4362.75 3920.1 4805.4 12 h after dark 4583.85 4256.3 4911.4