Registered Community Design - 001935099. 7W High power Cree LED. 450lm typical output . >60 Lumens per Watt output allows compliance with the building Regulations Approved document L1A/B requiring the use of energy efficient lamps in dwellings. Very efficient with a power factor of >0.75. TCS (temperature Control System) protects the internal electronics against overheating. Dimmable depending on transformer. Average lifetime up to 45,000 hours. 3 Year guarantee.