@jsg12206 The green and violet Erchonia technology doesn't refer to RLT or PBM at their web site so they are using the laser technology. This is how they describe their product sold to doctors:
What is Laser? Stimulated Emission of Radiation, produces energy in the optical part of the electromagnetic spectrum. This energy is intensified through stimulated emission, not to be confused with harmful radiation. Laser light color is identified by its wavelength, typically measured in nanometers, with one billion nanometers in a meter. Laser light covers nonionizing wavelengths from ultraviolet (100 – 400nm) through visible (400 – 700nm) to infrared (700nm – 1mm) regions.

This web site provides greater detail on the history of both lasers and LEDs for PBM. https://huelightusa.com/photobiomodulation-vs-red-light-therapy/

"Throughout its history, more than 60 terms have been used to describe PBM light therapy. For example, PBM was previously called low-level laser therapy (LLLT). This was because early devices used lasers to create red light. Today, lasers aren’t as widely used. Instead, LED lights are more common.

In addition to LLLT, photobiomodulation (PBM) might also be called:

Cold laser therapy
Phototherapy
Photomedicine
Laser biostimulation
Soft laser therapy
Monochromatic infrared light energy (MIRE) therapy

As a general rule, photobiomodulation (PBM) is the preferred medical term within the industry."