Electro Luminescent is short as EL. The working principle of the EL panels is like this way. The fluorescent material emit lights when is activated by the current filed which is put on the both ends of the electrodes . Combined with many different kinds of materials, so that light with different colors can be produced. The EL panels are with lower power consumption, soft light, different colors, and long service life, without ultraviolet rays, pt heat generated, so that they are usually called cold light source. The working principle of the cold light source is different from that of the point or line source. EL panel is an even surface source. It is not glaring, and it is no harm to body. It is with high resilience and can be cut into any complicated shapes.