660nm
660 nm vs 850 nm Red Light Therapy: What’s the Difference?
660 nm is visible red light; 850 nm is near-infrared. Learn how the wavelengths differ, what device specifications really mean, and why neither is universally better.
660 nm vs 850 nm Red Light Therapy: What’s the Difference?
660 nm is visible red light; 850 nm is near-infrared. Learn how the wavelengths differ, what device specifications really mean, and why neither is universally better.