MidnightSun72
Well-Known Member
Yes it is a UV 400 nm. However an LED doesn't just produce photons at 400nm it's usually a range like 370-430 with a peak happening at 400nn. So you would get some UVA radiations and then visibly be able to see some violet light.that’s what a chinese vendor wants you to believe what an uv light diode should look like. uv light per se is in the non visual spectrum. our eyes are not made to see it nor should you look at it. that picture is mostly certainly around the 400nm range...
additionally we were looking at a photo and as far as I know cameras are able to detect photons outside the human visible spectrum.
the reason we can't see UV light, though many animals can is that our lenses filter out the Uv light and many animals don't so they can perceive it as a colour. Also people with damaged or surgically removed lenses report to be able to see Uv light as a pale violet light.
anyway long story short you think it's a blurple.