... ;ensure the LED can work under the secure current; No Pollution to Power Network - Power factor≥0.9 , THD≤20%, ... design,it enhance the power factor effciency,reduces power loss and interference from the pollution of electric. Low constant current supplies the ... ,green and Environmental Protection - no lead, no mercury, no environmental pollution;10.Long Life, 50,000 -80,000Hrs - (Working for 10 ...