Purchased to help with surgical scar healing. Worked well but no longer needed. LightStim delivers light energy in a similar way plants absorb light energy from the sun. Each LightStim device uses different wavelengths, or colors of light. LightStim for Pain emits light energy that reduces pain and increases local blood circulation. This increased circulation accelerates your body’s recovery process and relieves minor muscle and joint pain and stiffness, minor arthritic pain, and relaxes muscles.