LED Light Therapy knee pads use light-emitting diodes (LEDs) to produce light waves in the visible and infrared spectrum that painlessly penetrate the skin and are absorbed by the body. Infrared (IR) light waves have a beneficial effect on nerves. Science has discovered that, “Nerve cells respond particularly well to IR….” and that IR “…can induce neural stimulation effects as well as promoting a wide range of therapeutic benefits in cells or tissues.” This is the perfect solution for those suffering with knee pain.