미국유럽 UL GS등 마크가 있다고 자칭하는 공장:
http://www.alibaba.com/product-gs/436191934/UL_listed_string_light_Normal_clear.html
http://hshdds.cn.alibaba.com/athena/offerlist/hshdds-sale.html
http://detail.china.alibaba.com/buyer/offerdetail/1165508435.html
http://detail.china.alibaba.com/buyer/offerdetail/1002464215.html
크리스마스트리 장식등구 통합검색
http://www.alibaba.com/trade/search?SearchText=christmas+lights&IndexArea=Products&fsb=y