I love near-infrared sauna therapy. Near-infrared therapy is great for neurodegenerative conditions like migraine. When I lived in Portland, I used to rent one by the hour, a model from SaunaSpace. The unit costs $3,000, and the lightbox panel costs $1,000. Rather than save this kind of money, I decided to construct my own light panel. Here’s how I did it – and all for $90.