... lifespan, nice appearance,low maintenance cost,saving Power,high efficiency 12W High Power LED Ceiling DownlightProduct Features 1. led ceiling ... 50% comparing with fluorescent light. 2. Alternative switch power supplier to change the voltage ,ensure led work routinely. ... 8. Electronic safety standard : class 1 Technical Specifications: Power Factor(PF):≥0.5 Total Harmonic Distortion:<15% The number of ...