condition mean min max 4 h after light 5.604686666666667 5.4352 5.704330000000001 8 h after light 5.64088 5.2748800000000005 6.03938 12 h after light 5.69472 5.6045 5.84578 4 h after dark 5.443836666666667 5.3425 5.55755 8 h after dark 5.3846533333333335 5.29772 5.55325 12 h after dark 5.362760000000001 5.20756 5.500380000000001