... 3.1 year warranty 4.Free sample 12U high power energy saving lampQuality is always good, service is always best ! Price ... that the tube heat will not transfer to ballast.if reorder one part,saving 50%cost8.Combination design,lamp cover options ... phosphor, large capacity IC chip, ST mosfet, negative temperature coefficient magnetic components.11.No stroboscopic, anti-glare, low-temperature start, wide ...