That is a concern, and the salons pitch expensive machines using high pressure bulbs with basically no UVA which will make your skin brown with little worry abo

That is a concern, and the salons pitch expensive machines using high pressure bulbs with basically no UVA which will make your skin brown with little worry about sunburn and has little vitamin d effect. Since you wouldn’t be going for aesthetics, the best is to use one of the cheap beds that makes UVA and don’t go for very long. Your skin will take a month before it gets even subtly darker. The salons call the cheap machines “sun burning” machines to up sell the more expensive “browning beds”, but just use that cheap machine and only use it for say 5 minutes instead of the max 20. I also cover my face. I am in no way noticeably tan after years of doing this, and the low dose protocol I use makes my body similar to the color my forearms are from normal sun exposure. I hope that is helpful, and it was years ago that I was evaluating the risks and I don’t have the exact figures anymore, but you can lookup the UV profile of the bulbs that are in the machine. Just google search the numbers on the bulb.