... for choice: A) IC Standard with chip, PF≥0.99, THD<15%, life time is 30,000h, 110V/120V/220- 240V ... -heating and EOL function B) TUV Standard, PF≥0.97, THD<15%, life time is 20,000h, 220-240V,50Hz C ... ) Ordinary Standard, PF≥0.95, THD<30%, life tim is 15,000h,220-240V,50Hz D ...