condition mean min max 2 h after light 7.960613333333333 7.23636 8.33298 6 h after light 8.00686 7.59953 8.52002 10 h after light 8.41356 8.15582 8.67541 2 h after dark 7.970133333333333 7.51466 8.47583 6 h after dark 7.2673266666666665 6.89534 7.72636 10 h after dark 7.1408499999999995 7.00582 7.32581