condition mean min max 4 h after light 9.340133999999999 8.719753 9.960515 8 h after light 8.5914795 8.175347 9.007612 12 h after light 8.9007535 8.322675 9.478832 4 h after dark 9.634116 9.129393 10.138839 8 h after dark 9.975751 9.925095 10.026407 12 h after dark 9.35181 9.35181 9.35181