Pennsylvania Power & Light Co. filed a proposal with the Public Utility Commission Friday (7/7) to reduce electricity bills by $7.5 million, or about one-half of 1 percent, effective July 17 because of state business tax cuts.

PP&L customers will receive a credit of 1.04 percent on the State Tax Adjustment Surcharge, a component of their electricity bills used to account for changes in state taxes. A residential customer who uses 500 kilowatt-hours a month will see a decrease of 22 cents, from $44.59 to $44.37.

A commercial customer who uses 1,500 kilowatt-hours a month and has a peak demand of 12 kilowatts will see a decrease from $175.96 to $175.06.

An industrial customer with 12,000-volt service who uses 400,000 kilowatt-hours a month and has a peak demand of 1,000 kilowatts will see a decrease from $27,078 to $26,949.

The company is sharing the benefits of a reduced tax burden with its 1.2 million customers in 29 counties of eastern and central Pennsylvania. In its 1995-96 budget, the state reduced the net income tax rate for corporations from 10.99 percent to 9.99 percent, retroactive to Jan. 1.