Is there a practical way today to use their findings with stuff we can buy at an hardware store?

Don’t buy anything. Use the sun, for the moment it’s free.

	▲	ZeroGravitas 6 days ago \| parent \| next [-]
		Given the bits about UV, using the sun plus a glass window might be better? I think standard glass blocks UVB and car windscreens often block UVA and UVB.
	▲	jama211 6 days ago \| parent \| prev [-]
		Or existing oxygen based cleaning products. The sun can cause other damage, it’s a balance

taneliv 6 days ago | parent | prev | next [-]

https://news.ycombinator.com/item?id=45209124 mentions that simply putting the stained cloth under the sun works.

amelius 6 days ago | parent | prev | next [-]

You can buy blue led strips just about everywhere.

delfinom 6 days ago | parent | prev [-]

Buy some diy flashlight kit. There's an entire community of people that build flashlights for fun and hence a ecosystem of parts.

Then put in the strongest 455mm wavelength diode you can find off Digikey that fits the kit parts.

	▲	kragen 5 days ago \| parent \| next [-]
		Haha, 455mm! That's 659MHz, which used to be channel 45 for UHF TVs in the US: https://en.m.wikipedia.org/wiki/Television_channel_frequenci... but has it been reallocated to something else like LTE? https://www.spectrumwiki.com/wiki/display.aspx?f=659000000&l...
	▲	unwind 6 days ago \| parent \| prev [-]
		*nm, as in nanometers.