If you need proper Red / Near Infrared Light Therapy, the best panels with zero flicker and all the proven frequencies by easylight.sk now accept Bitcoin with BTCPay Server - to their wallet, without conversion-to-fiat gateways.
They ship everywhere in Europe. I have the big one. Gamechanger, especially if you can't have enough natural light (office work, or if it's winter). Use it for recovery, anti inflammation, brain stimulation, energy production.
Use code JURAJ if you want a discount.
Thanks to Honza Pobořil for BTCPay-shoptet integration (I fixed it a bit: