Hot sale super bright 21w t8 led tube

LED TUBE LIGHT   Packing terms: 1pc/ cardboard cylinder.   Payment terms:   1. Paypal for small amount. 2. for mass order: By T/T, 30% deposit after order confirmed, balance to paid before shippment.

1). Your inquiry will be replied within 24 hours.

2). All your inquiries will be well explained by our experienced staffs.

3). Return of goods without any reasons. you can return if you don't like it, we will refund you.

4). we have good cooperation with DHL, UPS, EMS, FEDEX, we will try our best to save shipping cost for you.

5).  OEM services are provided.

1.  Q: Nearly all LED tube light look the same, in this case, how to know and judge the quality?
A: Price and exterior.
Though they look the same or similar, it is still easy to find the big differences in price and exterior. Price and exterior are two sides directly indicate the quality and they are mainly determined by raw material cost, for example, the cheaper led tube has fragile frame exterior, poor heat dissipation and driver with bad IC, MOS and capacitance. I know price is an important concerns for customers, it is difficult to sell if price too high. So, suggest you pick up the light with reasonable price, namely better price and cost ratio.
2. Q: Does T8 LED tube light really have 50,000 hours lifespan?
A: 50,000 or longer lifespan is only test theory data. The actual life is due to different working environments from in lab.
3. Q: What is CRI?
A: CRI is a figure which indicates the real objects colors. Like flood LED light, the CRI is 70-75Ra, 80Ra means higher cost. So the clients need to know it is real or not.
4. Q: What is PF and efficiency?
A: PF and efficiency indicate the driver electrical performance. The same, they are tightly connected with cost.