Xcellent Global A4 Bright LED Tracing Board Dimmable Brightness Micro USB Power Animation Drawing Stencil Light Pad Panel Illumination LD073 Brightness: 4480 Lux. Super bright led lamps provides a perfectly even illuminated surface. Compact, Elegant, Eyesight-protected designed and help you enjoy tracing. Adjustable Bringhtness - Simply hold your pressing to the button till you get the ideal brigtness (From Bright to Dark) Gets very little heat. Suitable for long hour working. Life time 50,000 hours' long Fits Size: A4