Have you tried Fly Fishing after DARK?
This Flashabou is brightly colored during the daytime, and GLOWS in the dark at night.
Approximately 9 inches (30cm) long.  'Extra Limp'

The right side of the photo above is the 'Daytime' Color.
The left side is the Glow-in-the-Dark Color.

Use a single strand like tinsel, for the body or ribbing on your nymphs.

Tie a few strands of this stuff into your Streamers or Bass Flies for extra attention from predator fish.

(Imagine fishing a Popper or Diver at night when Bass are more active during the summer.)

Try it on your flies for Crappie, Bass or maybe even Walleye or Catfish.

Or use it in deeper water during the day. Use the Sunlight to 'recharge' it,
then let it sink into the dark depths