Conspicuity lighting (Daytime Running Lamps) is also a very good application for LEDs. You can go the top-end route and get a Whelan LED module, which is very compact and bright, but pricey. Or you can go the off-the-shelf NAPA LED truck turn signal module, a bit less compact and pricey but still bright, as I did.
Here is the R&D thread I did on mine:
Daytime running lights on crash bars - ADVrider