Middle Ring is useful to descrease the temperature of ballast,and make the lamp life longer.

The color of plastic middle ring is custermized.

Tri-phosphor powder inside the tubes supply 60lm/watt,but halogen powder has just 

30lm/watt.Higher lumen per watt,more energy saver.

DERUN's energy saving lamps have passed strict quality test that the life time time can reach

8000 hours and the efficacy have more than 60lm/w.

Switching Test                                                   Aging-life Tester

Optical and Electrical Test

    Q:Can I get some samples?

    A:Yes,we are honored to offer you samples.

    Q:What is your warranty?

    A:We offer 1 year warranty.

    Q:Can we design packaging and add our logo on products?

    A:Yes,please inform us formally before our production and confirm the design firstly based

    on our sample.

    Q:How do you ship the goods and how long does it take to arrive?

    A:For the sample,we usually ship by DHL,UPS,FedEx or TNT;for mass product,we usually

    ship by sea.The arrive day depends on the distance and the efficiency of the courier.