... earth phosphor 3.1 year warranty 4.Free sample 12U high power energy saving lampQuality is always good, service is always ... !Quality warranty one year ! 1.High power factor:Power factor is more than 0.98, reactive power loss close to 0. 2.Energy ... phosphor, large capacity IC chip, ST mosfet, negative temperature coefficient magnetic components.11.No stroboscopic, anti-glare, low-temperature start, ...