SPECIFICATION ·No need to remove ballast & starter ·6w~20w to replace 18w~70w flurescent tube ·Fixture effective lumen: 90-100lumen/w · Power factor: 0.92 · Interface: T8/T10 ·Luminous decay: less than 1% each year (5000hrs) ·Long life span: over 50,000hrs ·3 years warranty