The Sauna Space FireLight is a canvas-enclosed near-infrared and red light sauna powered by hand-blown incandescent bulbs. Unlike most portable saunas that use far-infrared panels, the FireLight uses true near-infrared wavelengths (700-1500nm) for deep tissue penetration and photobiomodulation. The organic canvas enclosure, North American basswood frame, and stainless steel components are all chemical-free. It folds flat for storage and sets up without tools. If you prioritize light therapy alongside heat and want a portable unit built with premium materials, this is the benchmark.