Red Light Therapy Hat 660nm/850nm Hair Loss Treatment Cap Hair Growth Regrowth
Spectrum :660:850(660nm:48 2 crystals/PCS,850nm:48 2 crystals/PCS). Light therapy significantly increased hair density. Other Benefits & Applications of Red Light Therapy. LED lights emit red at 660 nm and near infrared at 850 nm, are the two most studied wavelengths with over 3,000 published studies on them.