The phrase "lower than standard" is correct and can be used in written English.
For example, "Her grades this semester were lower than standard for her usual performance."
Six compounds exhibited IC50 values lower than standard drugs.
Some others charge small fees, much lower than standard sales commissions, for listing a property.
This is why "blended rates" often look lower than "standard rates".
Energy requirements for successful defibrillation using this method are considerably lower than standard external defibrillation.
Mr. Dominici gave a brief overview of the piano, which has a heavier action that that of a modern Steinway and is tuned lower than standard concert pitch.
Because fewer drugs are necessary the cost of an IVM treatment cycle is substantially lower than standard IVF – £1,700 versus around £4,300.
The lower-than-standard radiation dose in our study may be one reason for the higher rate of bone healing we observed [17, 18].
There is a lower-than-standard level of fluoride in the community drinking water [ 21].
Furthermore, the effectiveness of a lower-than-standard dose (375 mg/m every 7 days for 4 weeks) remains unclear.
However, commercial fishing vessel safety standards are lower than standards for other domestic commercial vessels, and lower than international standards for fishing vessels.
However, we recognize that this threshold is lower than standards in the exercise field.
