We are specialized in the manufacturing and selling of Christmas replacement LED bulb (like C7-E12 /C9-C17 etc), Christmas led light string, holiday light led bulb etc , especially for C7 and C9 led bulb are certified by UL certificate . over 10years experience in China, we already build a good reputation due to superior quality, reasonable price and good service..we also provide OEM/ODM service as well. Toptrend can supply you diversified products to meet the market as we have a great team to support from development to selling.