Laser light!
What would you estimate the max throw at if using a lens with this LED instead of the reflector? (Not that it'd be practical... then again, this isn't, either.)
That's easy. You would gain some throw because the Rhodium coating of this reflector doesn't reflect as much light as other coatings (only 75%). A standard glass aspheric lens (assuming perfect precision, a DX lens wont cut it!) transmits 92% of visible light. With a lens with the same diameter as the reflector you would thus gain 17% Candela. If you use an ar-coated aspheric you will get an additonal 4-8%, so 25% gain would be possible.
To be even more precise you also need to account for the unused part of the reflector in the middle. Aspheric lenses don't have this, their entire surface is used. In this case it's a circle with a diameter of 40mm, so 1257mm^2, which is an additional 13%.
So in total 41% more Candela would be possible under perfect conditions. This would increase the actual throw distance by 19%.