Power (W): 9/10/18/20; Power factor: 0.5/0.9; Voltage (V): 100 �· 277/120/220�·240; CCT (K): 3000/4000/5000/6500/8000; Luminous efficacy (lm/W): 110/120/130/150; CRI (Ra): 80/90/Sunlike; Life span (hrs): 30,000; Flicker-free; CE, KC certified, can apply for other standards as requirements; Warranty: 2 years; OEM accepted;