... inquirey related to our products or price will be replied within 24 hours.2.All your inquireies will be well explained by our experienced staff ... this street lamp,we use Samsung SMD 5252 led chip made in Korea,whose CRI can reach 80,also the finished ... product can reach 100lm/W,we use RUBYCON driver made in Japan,and the weight is very light,27W=550G ...