It would if it were in a vacuum.

Because Spiral Knights logic.

A lump of hot RTG fuel can release gobs of cheap heat for years and years; plenty enough to light stuff on fire, and doing so at any arbitrary distance can be as much about focus and projection as sheer omnidirectionally radiant quantity. A starship is likely to have a high-specific-impulse engine for long-distance travel, which could easily be useless for lifting off from a world. Even assuming the Skylark has one fantastic type of drive that can do both, AND that this is also the engine that powers it, that doesn't mean the Fire Brandishes make any nonsense. I should stress that having one drive that's suitable for interstellar transit AND planetary lift is very unlikely, as is having the engine and power plant be one device, and that the intersection of all of those becomes astronomically implausible, pun intended.

I'm sure a few thousand incendiary small arms can fit very comfortably in the titanic gulf between negligible and orbital lift energy levels, to say nothing of the fact that being able to, say, build millions of bottle rockets that operate on the same principle as a moon rocket you happen to have is not even remotely close to the same as being able to fuel up that moon rocket and get it ready for flight.

Brandishes are made of a dense magnifying glass-like material.

http://drawception.com/pub/panels/2012/8-8/ggTE538XMa-12.png