... . The attenuation of SMD LED light source is less than 3% by 3,000hrs aging test under temperature 50 degrees celsius, ... protection and overload protection.8 Leading heat sink design, four light emission instead of backlight emission. 9 Special circuit design, each ... no RF interference14 Even illumination, quiet, soft, comfortable and bright light, ease eye strain effectively. 15 Long life-span: 30,000 ...