I think if you wanted a large reflector, you could buy a 300mm Lightforce reflector for about a quarter the price of this light. But thinking about what Dale mentioned - this would probably make an awesome CoB light! Would be a great form factor for some outdoor photography/videography, especially if you can mount it on a tripod.

The focal plane on the BLF GT is pretty big too, at least big enough for a 35mm diameter COB!