condition mean min max 3 h after light 20.19043333333333 17.4087 22.9028 6 h after light 19.3869 17.1734 23.0371 9 h after light 22.369833333333332 20.9464 23.8123 12 h after light 23.28185 20.6452 26.0776 3 h after dark 64.4486 61.5888 68.4866 6 h after dark 42.78863333333334 37.7218 47.0641 9 h after dark 27.3614 20.7417 31.0972 12 h after dark 20.36335 19.6401 21.0866