I haven't checked out superbrightleds.com, but I probably will before I buy. I did an led update to all interior lights on my 2005 fleetwood travel trailer, and I bought those from rvledbulbs.com on a recommendation I read on a forum to ensure they had the added technology to handle voltage fluctuations. The biggest benefits over incandescent is the amp draw/efficiency. I can run 10 LED's for about the same amperage as 1 incandescent, and they're much cooler. My bow light melted the greeb/red lenses, and I know why...within 2 seconds of being lit, that thing is so hot its untouchable with bare fingers. The LED's aren't cheap...expect to pay $5/bulb but they should last for practically a lifetime.
The red lights I put in are cheap water resistant led tape lights. They do work on 12V, but are probably sensitive to the voltage fluctuations. Since they cost me a total of $12, I'm willing to see how long they last without the use of diodes.
Jen ~1989 Sierra 160~