condition mean min max 2 h after light 1.5391115 0.705819 2.28651 6 h after light 1.3963895 0.872217 2.10994 10 h after light 1.4464375 0.410264 2.87215 14 h after light 1.4612893333333332 0.847477 2.27709 18 h after light 2.3767816666666666 1.04703 4.2696 2 h after dark 3.9890499999999998 2.0157 4.79418