Digital Electronic LED Display Screen, the Growth of Out-of-home Advertising: the Second-Fastest Growing Medium Behind Internet! Let SHENZHEN LIGHTPOWER TECHNOLOGY Work for You. We understand the importance of visual communication and being able to advertise from your front door. SHENZHEN LIGHTPOWER TECHNOLOGY LTD manufactures a wide range of Indoor and Outdoor LED electronic video display screen for advertising and live events, scoreboards, electronic message signs, time and temperature signs.