Lighting accounts for over 10% of energy bills, but switching to compact fluorescent lights (CFLs) uses 50-75% less energy and lasts 10 times longer than conventional bulbs. Washing full loads of clothes and dishes and keeping appliances clean also saves energy. Heating water makes up 13% of bills, so using low-flow fixtures, fixing leaks, lowering the thermostat, and insulating water heaters helps reduce costs and benefits the environment.