I used an ABR800 for this set on the lowest setting.I was around six feet away from the background and subject. Works great and much more power than an Orbis. If you want the effect, spend another couple hundred bucks and get the ABR800. I bought it, took about 10 pictures with it and put it away in a closet. Still there for another series I've got in mind, just have to make time to get out and shoot them. This light finishes up an awesome 5-light setup I've been kicking around in my head for some time...
Overlook the quality of this picture- it's a heavily reduced jpg that was resized for display on the web. Quality looks bad,but you can get an idea of the light.