condition mean min max 4 h after light 11.675965 11.224198 12.127732 8 h after light 10.477438 10.477438 10.477438 12 h after light 9.705427 8.933416 10.477438 4 h after dark 9.854127 8.980655 10.727599 8 h after dark 11.009922 10.106573 11.913271 12 h after dark 10.477438 10.477438 10.477438