3-5 years from the manufacturing date.
2.Are you the factory or trading company ?
Yes sure, we have own factory. We are a worldwide LED manufacturer, which specialize in developing, producing and selling for LED lights.
3.what’s the meaning of “Beam Angle “?
The spread of light from a luminaire. For example: a fitting such as a low bay ,which is closer to the floor,will have a wider beam angle to illuminate a given floor area while a high bay fitting will have a narrower beam.