Shanghai Supertek Lighting Co.,Ltd.(Supetek). Our company website is: www.Supertek.cc have been lighting business for more than 20 years and in induction business for more than 5 years. Our products are UL ,ETL and CE certified and currently 90% of our products are exported to the U.S and European market.Now we are one of the most professional manufacturer of induction lamps and high wattage HID electronic ballast.(600-1500W)