We are an Edison vintage light bulb professional leading manufacturer, we have been producing incandescent vintage light bulb for more than 15 years, we currently have more than 1200 different items. We have 10 automatic Edison vintage bulb manufacture lines, can produce 300 000pcs tungsten filament vintage light bulb each day. We use almost the best material, that is why our vintage bulb has a longer warranty of 6000Hours, the ordinary quality warranty is 1000 hours or 3000 hours, different warranty alongs with different quality. And the color of our vintage bulb not changes after a long time using, while the ordinary vintage light bulb will be more black color after some time using.