... structure is under patent protection included the appearance.Specification of LED Bulb1. Base type: E39/E40/Safety Rope2. Size: ... -10800LM 7. PFC:>0.98. Life span: 50,000 hours 9. LED Colours: Cool white, Natural white, Warm white10. CCT: 6000 ... -7000K, 4000-4500K, 2700-3200K11. CRI: >80RaApplications of LED BulbWidely used in factory, supermarket, theatre, convention center,park, entertainment ...