Tobar said:

Lightsaber blades have mass, they collide with each other and other objects. They're also solid which would block out the light from another source thereby creating a shadow.

If you're going to go in the direction, then why do the lasers in the lightsabers stop at a point? My point is the shadow casting is like seeing the wizard behind the curtain. Takes away the magic of the moment. I'm just trying to remove seams from a dress so it looks better, and you try to educate me on the scientific facts of a LIGHTSABER. (Sarcasm turned to the ON position in that last sentence.)