wrote

So why the nav lights? Because of that high pressure area over Utah.
Slows you down so that your arrival dictates a night landing... and a
bit of night flying. And that's why you need those nav lights.

Now -- who wants to tackle this particular Hot Project?

An easy way out might be to use an available LED bulb, and roll your own
reflector.

http://www.ledlight.com/ has a ton of bulbs, or perhaps would be a way to
get some LED's cheap by taking apart a bulb.
--
Jim in NC