Red and near infrared (NIR) light are both natural types of light which come from the sun and have been clinically proven to enhance cellular function. The main differences are that red light at 660nm only penetrates the body up to a depth of about 5-10mm and may contribute greatly to improved skin health and collagen production. Near infrared light at 850nm is invisible to the human eye and penetrates deeper into the body, between 50mm and 75mm, providing energetic and anti-inflammatory benefits at these levels which has been shown to increase muscle recovery and reduce joint pain, amongst many other benefits.