They talked about far infrared, I didn’t get the special lamp with the proper spectrum knowing that with a red hot coils I would get a continuous spectrum. The

They talked about far infrared, I didn’t get the special lamp with the proper spectrum knowing that with a red hot coils I would get a continuous spectrum. There is a bit of visible red light too, I didn’t study the detail closely, it was a cheap/fast test and it worked for me. I would guess that the best thing is the sun light, we don’t know what we don’t know.