TODAY between 4 p.m. and 7 p.m. the Wellesley Municipal Light Plant (WMLP) anticipates a peak in demand for electricity. WMLP customers are asked to voluntarily cut back energy usage during this time. It does not mean there is a shortage of electricity. Reducing electricity demand during this period will help to reduce both energy costs and greenhouse gas emissions. Customers can reduce electric use by waiting to charge Electric Vehicles, turning up AC thermostats 4 degrees, and postponing use of dehumidifiers, pool filters, clothes dryers and any other unnecessary appliances. By 7 p.m. the peak will pass and customers can go back to their normal use.