light emitting diode on the bench

red glasses lighting electronics orange toy led attached black wires light-emitting diode white background light emitting isolated light-emitting-diode led-lamp infrared-led infrared semiconductor crocodile-clips anode cathode aviation-lighting dimming electronic-component electrons emits-light fairy-lights flashing low-energy-consumption optoelectronic photodiode luminescence optical-communication hyaloid installation engineering digital silicon energy automotive lab physical physical-science researcher holding science single technical-service technician technology transducer transparent ultraviolet volt bench