As could be witnessed in the graphic, the LED symbol entire body consists of a diode image with two arrows. The 2 arrows denote that light is emitted from this product. An LED has an anode and cathode terminal. In the picture, the anode is around the left and cathode https://www.uk-exhibitionstands.co.uk/maximize-roi-choosing-the-right-exhibition-display-stands-for-business-needs/