Description: 1. We are ISO9001: 2000 approved enterprise, and our products have passed the certification of E-mark, RoHS, E13, TUV, DQS, CE. 2. We are the NO. 1 GOLD SUPPLIER in alibaba, more information pls go to our website: phohp.en.alibaba.com 3. Special six tests that can ensure the high quality of our products. 4. The inner and outside tube are made by Philips 5. The purerity of mercury is reach to 99.999999%. Luminous flux is adequate to protect the electrode and prolong the bulbs life 6. We have H 1/ H3/ H4/ H6 /H 7/H8/ H9 D2 series ect, with all kind of color temprature We purchase the material from Philips. The electrode and xenon air are imported from the . The production line is the best in Asia and almost completely automatic. These can prove that our quality is very good.