condition mean min max 4 h after light 5.636253333333333 5.58211 5.704330000000001 8 h after light 5.6717933333333335 5.63426 5.7283599999999995 12 h after light 5.782633333333333 5.60896 6.07276 4 h after dark 5.733646666666667 5.57782 5.8696 8 h after dark 5.62741 5.5757900000000005 5.67379 12 h after dark 5.50101 5.32881 5.644369999999999