Smart Electronics Design Co, Limited (SED), a leading LED light Designer and Manufacturer, Located in Shenzhen, China, since 2008. OSRAM and Philips Authoritative Engineers to Provide ODM and OEM service for you. As a best in class Lighting Enterprise, SED focuses on: l Commercial LED lights (LED Tubes, LED Panel Lights, LED Down Lights); l Industrial LED lights (LED High Bay Lights, LED Flood Lights, LED Street Lights, LED Tunnel Lights); l LED Emergency Power Supply.