The difference between laser and LED lights lies in how the light is produced and distributed. An LED lamp (Light Emitting Diode) consists of many small diodes that emit light in multiple directions. The light is non-coherent, meaning that the light waves move in different directions and phases. This creates a softer and more diffuse light that covers a larger area but does not penetrate as deeply into the tissue.
Laser light (Light Amplification by Stimulated Emission of Radiation), on the other hand, is coherent, which means that all the light waves are in the same phase and move in the same direction. This produces a highly focused beam of light with high energy density that can reach deeper into the tissue.
Both light sources can stimulate cellular activity and promote healing through photobiomodulation, but at different levels.