Large-area red, green and blue (RGB ... affected by the presence of material defects. So far, most green laser light is produced using infrared laser diodes in combination with second-harmonic ...

While these at-home devices can cost hundreds of dollars, one of our favorite red light therapy tools is currently under $100 ...

The three lights are meant to be used separately, but Dr. Camp suggests using the green light after the red and blue settings, as it is believed to have a soothing effect on inflamed and irritated ...