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