I've been using a lot of aeroleds, they are very nice and easy to install with low power draw. They are a little more expensive, but worth it.
Another option is HID. You can go with proven xvision airplane HID or try automotive HID. FYI-I have had problems with auto HID at altitude getting cold soaked and not firing upon descent. I think xvision must have worked this out.
The last option, and probably the least expensive is Cessna lights. They have a wide variety, but you would have to build some kind of housing.
--
Jon Hadlich
AI Systems
(541) 815-7381