A few weeks ago I saw @chap79 install some SuperBrightLED 9006 LED lamps and I checked them out. I liked the price point of them and just went for it trusting that his review was accurate.
Last night I had my wife drive the rig down the street and I jumped in my trusty old Camry and we drove past eachother a few times. I would glance directly at the new LED's and they were not any brighter than any of the HID lamps on all the newer cars. I actually was surprised since when I first took it out at night on a test drive, I was worried they'd be blinding people since they seemed so bright.
So far, I would recommend these. I have only had them for a few days though. I was running the Philips 9011 HIR's prior, which were a great upgrade, but these seem a bit brighter and more light spread. As far as offroad, no testing or feedback yet.
9006 LED Fanless Headlight/Fog Light Conversion Kit with Adjustable Color Temperature and Compact Heat Sinks - 5,000 Lumens/Set | Super Bright LEDs
Looking at the site, I'm sure not impressed. I like how you can wrap them to get the color you want. How cheesy is that? And looking at the comparison of their LED to the Halogen, I think the halogen looks much better. It has a better defined, more even pattern with sharp cutoff. And that is their picture which is suppose to show off their product. If you put in a set of 9012 HIR2 bulbs on the halogen side, I have no doubt that the halogens would look even better.
5000 lumens. Maybe in theory, but I'm saying no way. The only thing I see in their light is that it is bluer.