A European certification process which is sometimes confused with the UL Listing process in the US. There is no such thing as a "CE Listing". The CE "declaration of conformity" on a product is usually a self-certification by the manufacturer that the product complies with the applicable EN (European Norm) standards. The operative words here are "self-certification"--draw your own conclusions. The manufacturer chooses which standards they think are applicable, and what tests to perform (either themselves or using a third-party lab) to determine conformity. Typical standards for electrical gear in the lighting industry cover safety, conducted noise emissions (back onto the power line), radiated emissions (at radio frequencies), immunity to static discharges, and immunity to voltage spikes on the line. You cannot sell a product in Europe without a CE mark, if there are standards covering the product. And there are standards covering literally everything. But, there is no policing body that checks up on whether manufacturers' self-certifications are indeed valid. There is a rarely-invoked process where a customer or competitor can "cry foul" on a falsely marked product. Directors of companies are personally liable for monetary damages and jail time for knowingly falsifying a CE mark. The letters "CE" are the abbreviation of French phrase "Conformité Européene" which literally means "European Conformity".