Godemmio 670 nM USB-Taschenlampe, tiefrotes Licht, gegen Verschlechterung der Sehkraft

  >>They've already released a product! https://www.eye-power.co.uk/ It's US$72, GB£45.00

I think you've started a run. It's £54 / €64,80 / $86,40 now.

Surely even those prices are way over the top?...

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  >LIGHT SOURCE Premium grade 670nm Deep Red LED cluster
  >TIMER 3 minute session timer with automatic switch off
  >BATTERY Rechargeable battery with 2 weeks between charges
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Those specs sound pretty trivial for anyone with a bit of basic electronics nous to knock up. Just how expensive are these "670nm Deep Red LEDs" anyway? Most LEDs cost pennies. So, unless these are something special, I don't see where the cost comes into play.

EDIT:

A quick search finds 670nm LEDs available for £2,29 each [obviously cheaper in bulk] [0] and Amazon selling a 670nm LED torch for £5,61 [1]. I don't know enough about any of this stuff to know if all 670nm LEDs are created equal and if the ones which perform eye magic are "special" in some way. But it still seems like, if not out and out quackery, then there's definitely some cashing in going on here.

[0] https://www.mouser.co.uk/ProductDetail/Lumileds/L1SP-DRD0002...

[1] https://www.amazon.co.uk/670nM-Flashlight-Against-Deteriorat...