Irradiance is Power: The Key to Effective Brain Photobiomodulation
In brain photobiomodulation, near-infrared (NIR) light within the 810–1100 nm wavelength range offers beneficial cellular effects and deep tissue penetration. However, if the wavelength is optimal but the irradiance (surface power density) is too weak, penetration will be minimal or nonexistent. The two most critical factors determining the efficacy of this therapy are irradiance [...]