What is power factor in LED lighting?

What is an LED Power Factor Rating? 

The power factor rating is the ratio of real power (Watts) used by the load compared to apparent power (Voltage x Current drawn) into the circuit: Power factor = Watts / (Volts x Amps)

Shenzhenshi Zhenhuan Electronic Co.,Ltd(www.szzhpower.com) was founded in 2008, specialize in external power adaptor, ac dc adapter, Outdoor Waterproof Power Supply, led driver, Power Transformer, switching power supply, dimmable or non-dimmable LED Drivers and Battery Charger in Shenzhen, China. 

Zhenhuan is one high quality power supply manufacturer, we also have own brand  KSPOWER, and our products of power range from output 4.2W to 384W (output voltage 4.2V to 48V, output current 0.2A to 20A) a total of 1000 kinds of models and come with safety regulation standards: IEC/EN 62368, IEC/EN 61558, IEC/EN 61347, UL/cUL 62368, UL/cUL ETL/cETL 8750, UL/cUL1310 CLASS 2 and in full compliance with UL/cUL ETL/cETL RU/cRU CE ROHS SAA C-TICK KC KCC GS TUV FCC CB NOM CCC PSE CB certifications for global markets.