Conneth isn't accepting PM's so I thought I'd post here. "One problem though, there is no gravity in space!"
I'm not sure what part of the story "Light Space" is being referred to. If it is about falling out of the ship, into the endless white void of Light Space, then gravity is not a problem. Light Space is another realm, another dimension, outside of normal space and time, so things don't work the same way as here in our dimension / universe.
If it is about people walking about aboard space ships, well, the ship has artificial gravity, like so many other space ships in so many other stories.
Thank you though, for playing my game, and for leaving comments.