LED fairy lights are, in most ways, reasonably similar to traditional fairy lights. The ways they are different are important though, and the practical results of these differences can make a big difference to you. LED fairy lights are not made up of a string of bulbs which contain filaments, LED lights are solid-state lights. That means there are no components to come apart within an LED or light-emitting diode. The first and most exciting way LED fairy lights offer an advantage is a result of this difference. If one LED or LED bulb stops working, the likelihood is you will never even notice, because it won’t make your whole set of lights useless. One LED is a self-contained unit.