condition mean min max 4 h after light 137.647694 134.888477 140.406911 8 h after light 142.849415 136.466773 149.232057 12 h after light 120.153651 119.341488 120.965814 4 h after dark 147.637192 127.616672 167.657712 8 h after dark 114.8276525 77.186664 152.468641 12 h after dark 110.71575 110.71575 110.71575