Please try to rotate the bulb 180 degree and plug in again. Since the LED is polar sensitive, it means that of the power terminals are not matching correctly, the LED will not light up. (+ with + and - with -). But if the problem remains, please contact us.
Add:Tutang Chengxing Industrial Park,Tutang Village,
Changping Town,Dongguan,Guangdong,China
TEL: +86 769 81099632 ext 802      Mobile/Whatsapp/Wechat:+86 181 4589 5919                 
Fax: +86 769 82206126                                      E-mail: sales2@bw-light.com
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