condition mean min max 4 h after light 3.889333333333333 3.7968699999999997 4.00546 8 h after light 3.88619 3.8143800000000003 3.98366 12 h after light 3.8347200000000004 3.73863 3.9572300000000005 4 h after dark 3.9111833333333332 3.8507 4.02615 8 h after dark 3.9200233333333334 3.8467800000000003 4.00443 12 h after dark 3.90751 3.8302699999999996 3.98774