Color? Cree? UV? What? YAY!

[Zero Unit]

What was the primary wavelength on that LED though? What is needed is something closer to 405nm than 390nm.

[Novastar]

You are correct... here's something I got from a NASA science-ish website:

"The visible violet light has a wavelength of about 400 nm. Within the visible wavelength spectrum, violet and blue wavelengths are scattered more efficiently than other wavelengths. The sky looks blue, not violet, because our eyes are more sensitive to blue light (the sun also emits more energy as blue light than as violet)."

"Fascinating." -- Mr. Spock



Found here: http://eosweb.larc.nasa.gov/EDDOCS/W...rs.html#violet

I will keep that "yellow is 570nm" in mind. Getting close to that would be a gem of a find in an "amber" LED...