DLC Listed refers to a certification or designation given to lighting products that have undergone testing to ensure superior energy efficiency. When a lighting fixture is DLC-certified, it means that it has been evaluated and found to offer higher lumens per watt (LPW) compared to non-certified fixtures. This higher LPW ratio indicates that more energy is converted into usable light, resulting in reduced energy loss to heat and other inefficiencies. As a result, DLC Listed products can help lower electric bills for end-users.