So glad I found your post! I had started using a near-infrared light system years ago before being diagnosed when I just couldn't figure out what was happening to me. I was so stressed out that I couldn't see it made a difference so stopped. After 7 years on the PMR roller coaster I developed GCA and started from scratch on high dose pred. As I started my weaning I decided to revisit the red light therapy before any pain has started to kick in to see if it would help. I try to use it twice a day.