The name "Opticube" refers to the optics in several models, whereas the flagship "Luxeon" model is specifically the HL-EL500. (The 500 does have an impressively tight beam, so I guess they can crow about the opticube thing, for what it's worth.) If you want/need more lumens you can easily build your own LED array for less money per emitter, and do funky things like switch/dim each emitter manually.

Apparently lights are like religion on this forum: everybody thinks they've found The One True Headlight or something.