DLC is DesignLights Consortium, the governing body that certifies the quality and efficiency of LED Lights. It is a standard similar to Energy Star. Whereas Energy Star is for residential products, DLC is for commercial LED products. A DLC Qualified product may be eligible for rebates. Your local utility designates whether you are eligible for rebates or not, and it varies between utility companies. Currently there are two standard, DLC Standard and DLC Premium. DLC Premium is more efficient and will save you more money in terms of operating costs.