This is the third variation of this scene that I uploaded. This one has the least amount of postwork (e.g. no comic book type effects).
It uses the original unmodifed image from Luxrender where the sword is a metal material. I then created a second render where I converted the sword into a light source. In Photoshop I set this layer to Overlay blend mode.
Note: Noise in the scene is because I did not let it render long enough (it would probably take a few days to get a noise-free render per scene).
Disclaimer: I put the scene togther but I did not create the models or textures.