Understanding beamshots, why do we do them?

Nice .

Thanks guys!

An eye-opening lesson!

Thanks to okwchin for compiling it and thanks to simpleman for asking something that seemed quite trivial at first.

I think we want many different lights for different tasks . The nice thingis we can accomplish that by changing emitters ,reflectors and thereby changing the pattern of the beam .I love the last pic.the xpg thrower in a large reflector .