In article , Mark Lloyd wrote:
On 8 Dec 2006 10:42:09 -0800, "Chris Snyder"
wrote:


Mark Lloyd wrote:
And hopefully the colors don't fade and lose color as badly as the
incandescent ones do. I've had to replace too many of those
(incandescent's) that weren't burned out, but looked bad because bits
of the colored coating were missing.

That won't happen with LEDs. The LED bulbs project a very specific
color, specific to what element is in the chips producing the light.
The coloring of the plastic reflectors is for reasons unrelated to
light output: consumers expect it, and to be able to identify the color
of the bulbs when the strand isn't plugged in.

-Chris

Yes, LEDs are made for specific colors (and NOT white, which isn't a
single frequency).

Well, they do make white LEDs and there are white LED holiday lights,
and some of those are called "winter white" due to the usual icy cool
color of most white LEDs.

In the usual white LED, the LED chip is a blue-emitting one coated with
a phosphor that absorbs some of the blue light and converts that to a
"broadband yellow" (mid-green through mid-red) fluorescence. The
combination of the phosphor's fluorescence and the portion of the LED
chip's blue light that passes through adds up to a white whose color
rendering index is usually 70 to 85.

- Don Klipstein )