Well, I suppose it depends on how many top notch graphic adapters you have. But Luxrender is much slower than Firefly. It's a renderer which tries to be physically correct, this does not come cheap in terms of render time.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.