...but can you sing?  LOL!

Anyway, I had another question:

In the case of something "not real" like a lightsaber, what methods do people use to include this in a Lux scene?  I find that using a cylinder for a blade, to get the ambient light birght enough, you lose the color, but get nice realistic reflections and such. 

Since it really is a fictional object, it seems you can do it more justice in postwork, by adding it, but you can't add the ambient light, of course.

Do people render twice, and mask out the object or some other "trick of the trade"?