The phrase "are able to lower" is correct and usable in written English.
You can use it when discussing someone's capability or capacity to reduce something, such as costs, risks, or levels.
Example: "The new policy indicates that we are able to lower our operational costs significantly."
Alternatives: "can reduce" or "have the ability to decrease".
"I hope they are able to lower the premiums.
The amphiphilic mono-tethered SCNPs are able to lower the surface tension of water.
DIET AND EXERCISE -- Some patients are able to lower their cardiovascular risk by losing weight, eating healthier, exercising and quitting smoking.
Intel has said that it offers legitimate discounts based on the volume of chips that have been purchased by companies, and that consumers benefit when personal computer manufacturers — using the discounts — are able to lower the cost of their products.
This clinical trial, in which subjects ate at least 10 servings of fruit and vegetables a day, provided evidence that persons who consume a diet containing more fruits, vegetables, and low-fat dairy products and less saturated fat are able to lower blood pressure significantly within two weeks (without the use of any blood-pressure-lowering medications).
Although all currently available hybrid-power engines are able to lower the amount of exhaust emissions and the fuel consumption of the engine, they are still unable to achieve a stable and optimal running condition immediately after ignition; hence the engine's thermal-efficiency remains low.
She was able to lower the doses of her inhalers and diabetes medicines.
By eliminating a commissioned sales force, Countrywide was able to lower the price of its loans.
The board was able to lower the tax increase by raising revenue projections.
Firefighter DiBernardo was able to lower himself part way before he fell, too.
