Our Lady of Grace night light is LED with a on/off light sensor. The sensor turns the night light on when it starts to get dark and turns it off automatically when it gets light. No on off switch or bulb to replace. LED bulb will last 100,000 hours. This night light is ETL tested and approved. ETL Mark is proof of product compliance to North American safety standards. Authorities Having Jurisdiction(AHJs) and code officials across the US and Canada accept the ETL Listed Mark as proof of product compliance to published industry standards.