p20 outdoor led display screen pixel pitch: 20mm pixel density: 2500 dots/ sq.m pixel composition: DIP456 LED composing: 2R1G1B LEDs Brand Red: Optotech( China Taiwan) Green: Silan( China mainland) Blue: Silan( China mainland) LEDs Wavelength Red: 615nm-635nm Green: 520nm-475 Blue: 465nm-475nm White Balance: x= 0.33 Y= 0.33 5600?K( adjustable up to 9000?K) Brightness: > 6000cd/ sq.m Brightness Uniformity: Luminance Discrepancy