"to lower down" is a correct and usable phrase in written English.
You can use it to describe a decrease in something. For example, "The government plans to lower down taxes across the country."
The Bush administration is looking to lower down payment requirements, at least temporarily.
Theoretically, to lower down the complexity, the two thresholds T t and T s of our scheme can be further fine-tuned.
High levels of Nitrate nitrogen can cause the respiration efficiency of fish and aquatic invertebrates to lower down, leading to a decrease in animal and plant diversity, and affects use of the water for fishing, swimming, and boating.
Insurance companies provide you with the option to raise your deductibles to lower down their liabilities, which also results in a lower premium price.
When we introduce new technology for production, we are all like the canary they used to lower down in a cage to test for gas in a coal mine.
Hill then moved his headquarters to the copse, but was then nearly killed by an approaching glider which barely managed to pull up in time, landing in the trees above him; upon investigation, Hill discovered that it contained his batman and personal Jeep, which took some time to lower down safely.
The president proposes to lower down-payment requirements on qualified applicants for FHA loans.
Tentpole releases tend to land lower down on the quality spectrum.
To fit the targets for injecting the gas into the natural gas grid [1, 5], CO2 concentration has to be lowered down to ca. 2 4 % (Table 1) [6, 7, 8].
For MR scanning, the museum specimens had to be lowered down to distilled water in a gradual alcohol series.
I had to lower myself down because I thought I was going to fall".
