condition mean min max 2 h after light 2.194395 1.33214 3.85403 6 h after light 1.0872556666666666 0.718273 1.72813 10 h after light 2.0180553333333333 0.197102 3.0971 14 h after light 1.2975228333333333 0.411947 1.96024 18 h after light 2.2482 1.70043 3.02543 2 h after dark 2.68668 1.9796 3.38402