... to sure the best energy saving, 4, Use PC tube and cover to insure the safety, 5, Saves ... more than 70% energy compared with traditional fluorescent tube, 6, Strict quality control, aging test for 48 ... glowing effect even if a single LED doesn't work,8, Fast turn-on, no flashing or flicker ... 70 Input voltage 90~277V AC or DC Work Voltage DC36~DC40 Tube Material Aluminium & Clear PC Aluminium & ...