The old IPF lights were, quite frankly, garbage. Not very bright and they didn't respond well to any moisture.
The new Auxbeam LEDs are awesome. Super bright, throw light in all the right places, and stand up well to the elements thus far.
I have them wired directly to the battery with a light-up rocker switch located adjacent to the factory off-road light switch (in the switch blank where the startup clutch cancel is located on manual Xterras and Frontiers). I'll try and grab a couple pictures tomorrow for reference. I never do a good job of photo-documenting my modifications, I tend to focus more on the trips.