condition mean min max 2 h after light 1.8973 1.58594 2.36904 6 h after light 0.9643568333333333 0.547982 1.47539 10 h after light 1.3486705 0.507183 2.02929 14 h after light 1.9776133333333334 1.12174 2.9961 18 h after light 2.2507099999999998 1.46429 3.15284 2 h after dark 1.2645495 0.866837 1.58848