condition mean min max 3 h after light 15.444183333333333 10.8745 21.8615 7 h after light 16.376175 13.3756 20.7031 11 h after light 15.779425 12.243 19.8648 2 h after dark 15.578875 10.5485 20.6511 6 h after dark 15.588525 12.2268 18.0804 10 h after dark 15.390158333333334 10.5286 21.3077