Full Color LED Cabinet Display Full Color provides a lively way to advertise your company. There are two types of LED panels: conventional (using discrete LED's) and surface-mounted device (SMD) panels. Most outdoor screens and some indoor screens are built around discrete LEDs, also known as individually mounted LEDs. A mixture of red, green, and blue diodes is driven together to form a full-color pixel, usually square in shape. These pixels are spaced evenly apart and are measured from center to center for absolute pixel resolution.For the best visibility in close proximity with full color signs, 10mm pitch or lower is recommended. For further away or high up locations, P16 & P20 full color signs would suffice.