As Can be found in the impression, the LED image body includes 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. From the picture, the anode is over the still left and cathode on https://www.uk-exhibitionstands.co.uk/10-creative-ideas-for-customizable-banners-that-grab-attention/