I've got the 14.4v version shown on this page:
http://www.maxtool.com/product/search.asp
I only bought the light because, at work, we use some of the 14.4v Dewalt tools and I thought it would be fun to have the flashlight since we have quite a few of the batteries around anyway.
It's a great light, but of course, quite heavy.
It throws very well and will put a large hot spot on a tree a couple hundred feet away, and the spill is brighter than a typical flashlight as well.
I honestly don't know the lumen count of this light, but it appears to me to be in the 350 range from what I can see compared to other lights I have.
Keep in mind that the Dewalt light has a much larger than typical center beam, so you really can't compare it to the current generation of pencil-beamed "throwers".
Bottom line; don't buy the light just to have it because you then have to use the proprietary Dewalt batteries at about $65 a pop. There is no other battery option for it. And don't forget that you'll need the charger as well for another $65 or so. What that means is that it's not a "$29.00 light", it's really a "$160.00 light".
BUT, if you use other Dewalt tools that already need the batteries, then by all means, get the light made for whatever voltage batteries you're using (18v, 14v like I have, 12v, or 9.6v). Dewalt makes flashlights for each of their battery lines.
I like mine so much that I bought a second light to keep by my back door at night for letting the dog out. I only have to charge it every three or four weeks or so.