... width modulation (PWM) technology, to ensure that the power supply of high stability and high efficiency 2. CLASSII segregation 3.totally-sealing ... effectively guarantee the long working life LED lamps and lanterns and reduce the LED light failure 5. aluminum alloy cooling structure, make the power has ... Reference TUV EN60950-1,EN61347-2-13 design 9.Emc standard: EN55022classB; EN6100-3-2,3,4,5,6,8, ...