If I understand these posts correctly: 2 mile, maybe even three mile led lights are here already.
Orca Green Marine can set you up with a tricolor with various options for between $240 to $370 for a tricolor/anchor with a photo sensor to turn it on and off and strobe. And if I recall, it's no taller than a can of 8oz pineapple slices. [a little taller]
Stecktronics have more reasonably priced light inserts for existing AquaSignal fixtures.
svhotwire carries led replacements for incandescent 15mm bayonet bulbs. And the Sea Sense line of dome lights, strips and recessed lights.
Haven't compared any prices. Here's a young business attempting to do it all for you.
Led's are available for almost everything on deck and below. The people I ran into at the boatshow are
www.svhotwire.com
They were so new they didn't have a brochure.
If you already have a plain ole anchor light on the mast top, an outfit called GreenRay (Deep Creek) makes an led 'bulb' they call a light-engine you can retro for a mere $495. For cryinoutloud!
Somewhere I saw an even flatter (pineapple can sized) tricolor light out of sweden or denmark. led's is the only way to go. If anyone establishes a relationship with svhotwire let us know, ok?