Made in Blender. Rendered using built-in render engine.
Welcome to the forums! Here are some details I noticed that could need some improvement:
The back spot lamps seem to be missing shadow, which looks unnatural. The glow effect stops at the handle, like the handle was combined on top of the glow effect. You should apply the glow effect to the entire picture, on top of all objects, or it’ll seem strange when an object just “cuts” it. And the image suffer from destructive jpeg compression artifacts, you should render out a png image and be careful with the compression settings if you’d like to save as jpeg. Lastly you should use a better composition, try to move the camera closer and maybe rotate it?
This may seem like a lot of things to improve on but they would certainly improve the image a lot!
Thanks for the tips. I’ve taken your advice, and here is what I’ve come up with.
I was actually using halos for the blade earlier, but now it’s nodes.
The last image was actually a PNG, so I don’t know what happened there. I did turn up the compression quality, so hopefully that will fix the problem.
Very nice work. looks great. 
Thank you.
BlenderArtists converts all attachments to jpg regardless of what format they were uploaded in.
Two thoughts on the saber:
1, the white part of the blade should be totally white (the red glow is overlapping the white).
2, the handle looks a bit fat. I don’t think it would fit in your hand very well. Maybe skinny it up a tad?
But seriously, good work overall. :yes:
–Robo
Excellent!
So next you will model the Jedi right? 
For this color of lightsaber, I would expect a Sith Lord. 
It looks a lot better now, great work! Do you use Blender 2.5 with color management? Some of the light calculations seem a little odd, could just be me though.
I use 2.5. I think maybe what you are seeing is the red lamp that I put in the blade to make it affect the surroundings a little.
Wait. How exactly did you achieve the blade? Lamps?
It’s a subdivided line with a white halo, then nodes for everything else. The lamp doesn’t affect the blade at all. The only purpose the lamp serves is to cast a some what reddish light on the ground.
Ah, nevermind then, it’s just my brain fooling me and yes I noticed the red lights, and they sure aren’t errors.