get a broad spectrum red light bulb, that is most well understood and is least risky. Cons is the targetted spectrum would be only a small portion of it but goo

get a broad spectrum red light bulb, that is most well understood and is least risky. Cons is the targetted spectrum would be only a small portion of it but good thing is it is a 4$ cheap test. It worked for me for smaller issues, like minor burns, cuts etc.