As Is usually viewed inside the image, the LED image physique is made of a diode symbol with two arrows. The 2 arrows denote that light is emitted from this product. An LED has an anode and cathode terminal. While in the image, the anode is to the left and https://www.uk-exhibitionstands.co.uk/product/air-inflatable-backlit-square-tower-3m-3200mm-h-2/