An LED has two qualified prospects: the anode (favourable) and also the cathode (adverse). It is vital to connect the LED the appropriate way all-around inside a circuit—LEDs are polarized components, and reversing the polarity will prevent them from Operating. Light-weight-emitting diode (LED) can be a greatly employed standard supply https://www.uk-exhibitionstands.co.uk/product/merchandiser-kit-00-10ft/