In 2012, LEDs are gradually maturing. The track lights on the market are gradually replaced by LED light sources from the previous metal halide light sources. It is more energy-efficient and environmentally friendly. Nowadays, the track lights that people usually call are also collectively referred to as LED track lights. The track lights should be installed on the matching track. The inside of the track contains voltage input (220V AC input in China, or can be customized as low voltage input). It has conductive metal strips on both sides of the track. (Quality is made of copper. , the inferior is made of iron), and the joint of the track lamp has a rotatable conductive copper piece. When the conductive copper piece on the track lamp contacts the conductive metal strip inside the track, the track lamp can be energized. The track light can be illuminated.