I think you can find cheaper LED light bars than what Woot has listed. They've had these listed before and they aren't any better this time around. I paid a lot less for two 6" flood LED light bars for my ATV.
A few years ago I bought a set of LED light bars from Rigid Industries. Never again. For what I can find on a site such as Amazon I can buy three or four of the same size light bars as what can be bought from Rigid. So the cheap ones produce 10% less light, I'm not sure I could notice that difference in real life.
I've bought a few lights from OPT7. Got an 8" light bar on my ATV that I use instead of the OEM halogens. So far it's worked well although I haven't put it to the test in mud/water. It puts out almost as much light as my Titan headlights and cost like $50.