Our edge-lit sign use only two T5 Tubes and reach 3500LUX-6000LUX or above. The technology we use is the same as LCD screens in notebook computers. Our product advantage: A: High brightness: 1600CD/M2 B: Even light distribution C: Ultra slim (28MM) D: Energy saving E: Easy Graphic changing F: Easy maintenance G: Stylish Design H: Competitive price