Registered Community Designs - 001935081/001935099. High power LED lamps using Cree LEDs. 50 Lumens per Watt output allows compliance with the building Regulations Approved document L1A/B requiring the use of energy efficient lamps in dwellings (8W lamps). Very efficient with a power factor of >0.86. TCS (temperature Control System) protects the internal electronics against overheating. Dimmable on most common dimmers. Average lifetime up to 45,000 hours. 3 Year guarantee.