The light from white "LEDs" is a mixture of a fairly narrow, blue, peak,
direct from the LED, and a broad, low, yellow one from the phosphor.
The fact that they don't excite the phosphor with UV is one of their
advantages, when compared with CFLs (where the actual physics is also
pretty much constant current driven).
More expensive ones, will have a red LED as well to give better
rendition of reds.
A lot of the visible light IS from the LED.
On 07/01/17 12:55, Charlie T, K3ICH wrote:
The actual light is emitted NOT by the LED itself, but a phosphor coating
inside the LED which is excited by the LED's output. Dirt-cheap hand
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
