1. More than 60% energy saving 2. power: 14w,21w,28w,35w,49W 3. PF>0.99, ... flicker and humming sound2,voltage including: 230V AC3,wattage including: 2’14w, 3’ 21w, 4’28w, 5’35w, 49W , 6 ... ,2’21w, 8,2’28w4,good for environment: less mercury5, PF>0.99, THD ...