TALLAHASSEE, Fla. – Customers of Florida Power & Light and Gulf Power will see slightly higher electric bills in January, after the state Public Service Commission on Tuesday approved a series of costs that will be passed along by the utilities. Gulf residential customers who use 1,000 kilowatt hours a month will see their bills inch up from $140.43 to $140.62. The Public Service Commission held a hearing Tuesday on projected utility costs for such things as power-plant fuel. Tampa Electric Co. announced Tuesday that its residential customers who use 1,000 kilowatt hours of electricity a month will see bills go from $97.69 to $105.25 in January. Also Wednesday, the Public Service Commission said customers of Florida Public Utilities Co. will see reductions in their bills in January.