... led street lamp is very hot selling,which is not because of the very competitive price but because the high quality ... .2.How can we know your product is ... RUBYCON driver made in Japan,and the weight is very light,27W=550G,36W=600G,45W&45W ... replace big 4U, 8U etc.4.What kind of reports you have?IES files,Specifications,test report, ...