As could be observed within the graphic, the LED symbol physique consists of a diode image with two arrows. The 2 arrows denote that gentle is emitted from this gadget. An LED has an anode and cathode terminal. In the picture, the anode is within the left and cathode on https://www.uk-exhibitionstands.co.uk/product/casonara-blimp-cube-360o-hanging-light-box-display-240l/