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.