Handyman Tip- One Way To Help Lower Your Electric Bill By Turning Your Water Heater Temp Down 

With the high electric kilowatt rates, it may be more expensive than you realize to run an electric water heater.
By lowering the temperature from the unnecessary 140 degree factory setting, to a comfortable 120 degrees, you can count on saving a substantial amount of money on your light bill.
Now, in a commercial setting like a restaurant, DO NOT DO THIS. In food service, you are required by law to maintain your hot water at 140 degrees for your kitchen.
Unless you have a bathroom has a separate water heater. Then the bathroom would be the only one that you would want to set a lower temp for mere safety of your customers. In that case, set it at 110.