Indian Summer - welcome to the forum! I like your name.
My husband and I did a fair bit of research on this topic. We just bought a far infrared sauna from Pro-line (a Canadian company). I think West Coast Sauna is the same company. We got the hemlock one called the Malibu and it's a two-seater. I've only used it 3 times so it's early days, but I like it so far.
I tried one out before this and I have to say the one we got is much more comfortable. You want to be able to lean back and some of them have a straight horizontal bar that goes right across your back - very uncomfortable. This one has vertical slats so it's much better. We also chose the carbon heaters. I don't have much knowledge about
the lights. Still have to figure that one out.
Far infrared is the one you want for Lyme Disease. Good luck!