With PF>0.9,Inner and Isolated Power Supply,4ft 12W LED Tube Light T8 1.> ... 3 years warranty Product Name:With PF>0.9,Inner and Isolated Power Supply,4ft 12W LED Tube Light T8Features:1. Save ... lamp3. PF>0.9,No flash, drive by isolated and constant current power supply, protect eyes.4.Using High Lumen Flux ... for quality testing!!!! With PF>0.9,Inner and Isolated Power Supply,4ft 12W LED Tube Light T8