CTA Dimming (Colour Temperature Adjustable) . Dims from soft tone to flame, lamps appear warmer when dimmed. TCS (Temperature Control System) protects the internal electronics against overheating. 7W High Power CREE LED. 250lm typical output. 40 Lumens per Watt output allows compliance with the Building Regulations Approved document L1A/B requiring the use of energy efficient luminaires in dwellings. Mains supply voltage 220V - 240V. Very efficient with a power factor of 0.86. Lasts 40 times longer than an equivalent incandescent lamp (40,000 hrs). Dimmable.