mawktheone t1_iu1v4tw wrote
Reply to comment by rubseb in Enter a wavelength of visible light (380nm - 808nm) to see what color it is by CoherentPhoton
So without looking if you're buying LEDs and they're listed as 452nm do you know what is?
Or if you're trying to match a product that already has lights, can you tell the shop what shade you need?
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