I've been devotedly allowing 15 minutes each day over my hands as the left CMC large thumb joint developed early stages of osteoarthritis, as seen on an X-ray...Experiencing pain, especially while using my hand in food prep ..As a massage therapist, this was most concerning. My experiment over the past 6 weeks. I now have very little pain and use my hands regularly with massage therapy I have no pain, I do look at the underlying cause and misuse of my hands with overuse of the left hand and I am now more conscious to share the load between both hands. I have set up the 450 lights on a stand above the massage table for client treatment combined and alternating applying Massage therapy.