White LED Backlight Module - Medium 23mm x 75mm These pretty strips of light are plastic diffused backlights, often seen in LCD displays. Normally they're tucked behind the LCD and shine white light from below. Each LED is encased in a 3.5mm thick strip of a acrylic. The acrylic strip is a special type that is very good at diffusing light, so even though there is only one single white LED, it provides near-uniform lighting. Backlight has a 0.8" by 3" (23mm x 75mm) lit area Dimensions: 107.5mm x 22.6mm x 2.7mm / 4.2in x 0.8in x 0.1in Weight: 5.6g