Even better than replacing the bulbs with LEDs, I'd love to see a clear tail light lens with LEDs. It would give the bike a more modern look.
That would probably be very expensive...custom plastic for a bike that hasn't been made in almost ten years(yikes!).
anyway...update on my experience.
I didn't quite understand something that was said by a few of you, as I hadn't dived into the light assembly yet.
The rear tail light assembly has FIVE bulbs in it -- from left to right, left turn signal (white light, yellow lens behind the red plastic), brake/driving light, center driving light (also lights the license plate), brake/driving light, right turn signal.
The three center lights are all dual filament, but the center one is only a driving light...the bright filament is unused and not hooked up to anything.
So, the center light kinda tossed me for a loop, and while out on the bike, yeah, I forgot about all the good advice, and replaced it with an LED. Worked, but today when I took the bike to work, sure 'nuf, the unhappy "Something's wrong!" light was lit. At which point, I reinvented the wheel and put the center bulb back as it was, and now all works great. I was very proud of my brilliant fix, until I re-read this thread and saw people telling me to leave the center bulb standard. Ah well, you guys tried.
I did make a little mod that I think was good -- the center light's bright filament is unused. Well, I figure you can never have too many brake lights, so I ran a jumper between the (in my case) left brake wire and the center bulb's bright filament. So now, when I hit the brakes, I got two fast acting red LEDs and one slower acting incandescent bulb I didn't have before. And while there, I added a cheap flasher I picked up at a local cheap-stuff store for a couple bucks, which lives right under the light assembly, on the rear fender.
The red LEDs for brake lights avoided the "pink" look that was mentioned.
I have not done anything with the turnsignals yet. Not sure I will.
Total investment: $25 for a pair of red LED replacements (local autoparts store), $3 for the bright flasher thingie and $2 for a box of clips so my additional brakelights were detachable.
Really, a no-brainer upgrade. Getting to the tail light bulbs is probably about the easiest repair one can do on an LT.