What exactly is red and near infrared light therapy? Light therapy, sometimes referred to as photobiomodulation, is a non-invasive form of therapy that involves using LED lights to deliver specific wavelengths of natural light to your skin and cells. More specifically, The Hooga HG24 Red Light Therapy Handheld device delivers red (660nm) and near infrared (850nm) wavelengths of natural light at high power (greater than 80mw/cm2 at the surface) which allows you to enjoy the benefits of red and near infrared light therapy in a few minutes, all from the comfort of your home.