"Ernest Christley" wrote

Make yourself a fairing out of 1/4" plexiglass. Well, not a whole
fairing, just a section that would be the glass that you'd have for the
light anyway. Now drill some 3/16" holes in it. Not just any way.
Drill the holes to distribute the light of high power LEDs in the
appropriate directions. Drill the hole with a high speed drill.

I like your thinking, but I'll add one more thing.

Modify your drill bit, or buy one for Plexiglas, or you risk cracking your
Plexiglas.

Use a dermal tool with a thin cutoff wheel, and use the side of it to change
the angle of the leading cutoff edge of the bit. As it is, there is a
positive angle to the bit, which is usually good for lifting the chips of
metal away, and helping the bit to self feed through the metal. That is a
"bad thing" for plexi. You want to have a 0 degree, or perhaps -1 degree
edge to the bit to "scrape" the material away, and that will pretty much
eliminate the chance of cracking the plexi. The drill bit, unmodified, will
try to pull it's way through the soft plexi too fast, which can cause the
cracking.
--
Jim in NC