I never said it is the same as open furnace. I just said that there is a distinct lack of health considerations around this idea. And your commend really underlines my statement. I mean, IR is not visible and if I can't see it, it can't hurt me, right? :-D

But seriously: She has 22 IR LEDs. Let's say 50mW each and you have over 1W of illumination in there. If you wore it while outside/at work, it could easily add up to 10 hours a day, 6 days a week. That's really not "nothing", even though the immediate intensity is not comparable to furnace, the overall dosage very well might be...

I have IR burnt streaks running over both my corneas from working near an airfield in the 80s. Those are from diodes, or perhaps tubes.