An LED has two leads: the anode (optimistic) plus the cathode (negative). It is vital to attach the LED the proper way all around in a very circuit—LEDs are polarized factors, and reversing the polarity will prevent them from Doing the job. Light-emitting diode (LED) is really a greatly utilized https://www.uk-exhibitionstands.co.uk/product/standard-square-blimp-tower-with-tapered-tube-blimp/