As is often found in the picture, the LED symbol human body contains a diode symbol with two arrows. The two arrows denote that mild is emitted from this system. An LED has an anode and cathode terminal. While in the picture, the anode is about the still left and https://www.uk-exhibitionstands.co.uk/product/air-inflatable-backlit-circular-tower-2m-2280mm-h/