condition mean min max 0 h after light 2.386235 1.7563 3.01617 4 h after light 2.1976199999999997 2.04519 2.35005 8 h after light 23.0338 22.8584 23.2092 4 h after dark 4.75129 3.95823 5.54435 8 h after dark 2.2930099999999998 1.74431 2.84171 12 h after dark 1.29908 1.12753 1.47063