Yes, I have. I'm heat intolerant but gave it a go anyway. I did a 30 minute session which almost sent me into fits. I have an infrared lamp with a mineral plate which I like and use regularly. The sauna was too much for me and I did not notice much improvement in how I was feeling the next day. I like my lamp better. I can use it on a troublesome area with good results. Take care.

I have an infrared lamp by Beurer, a German company. (I bought it overseas.) It does give off heat, but I'm pretty sure it is not the heat that is helping me. (I have used heat wrap around my neck before, but it only made the pain worse.) It is the light, but the owner's manual does not say what the wavelengths are. Some online reviewers said they asked the manufacturer and they said it has a broad spectrum of wavelengths from red to far-infrared.

My physical therapist recently used a cold laser on my neck (TheraLaser), and I did noticed a very significant improvement a few days later. This is a Class 3 laser, and it costs thousands of dollars.

I have been reading up on light therapy recently and learned that the most therapeutic wavelengths are are between 600 to 900 nanometers (red to near-infrared). It promotes cell healing, regeneration, production of ATP, etc. Light therapy uses both LED's (reach shallow tissues) and lasers (reach deeper tissues like joints).

I just ordered a mini combo light (consisting of LEDs) from Red Man Light (a company in the UK), which gives off 4 wavelengths in this range. (It looks like a shower head.) They also offer a panel of LEDs that gives off a sauna effect (but much more expensive). They told me that it does NOT give off heat.

If you look in the internet (YouTube), some people show you how to make your own infrared sauna from items from the hardware store. However, it looks like they are only using heat lamp bulbs that are not necessarily in the therapeutic range of wavelengths discussed above.

I will let you all know how the Red Man Light works out.