Recently I designed and built a nav light system for my Europa aircraft
using the Luxeon LEDs with great results.

I also measured the radiation pattern (after fitting the LEDs to the
aircraft) and compared it to the FAR specs. It exceeds the requirements
by 3-5 times, and draw only 2 Amps total. It is bright enough to almost
use as a landing light.

Actually, I am surprised that most manufacturers do not provide a
measured radiation pattern. They just say that it complies with the
FAR. Well, meeting the specs is not the same as exceeding it. Since
LEDs lose power with age, this could be an important consideration.

Just in case someone might find this useful, I wrote it up as an
article:
http://www.sarangan.org/aviation/eur...tip-Lights.pdf

Let me know what you think.