Long ago (say, the 1980s), in a galaxy far, far away, it was pretty easy to tell one lightsaber from the next: Obi-Wan Kenobi's was blue, Darth Vader's was red, and Luke Skywalker's was first blue, then green. Piece of cake.
However, three decades, a couple of animated series, three -- and soon four -- movies, and countless Jedi and Sith later, a devoted Star Wars fan just might require a score card to keep track. Luckily, HalloweenCostumes.com has stepped up with an infographic detailing "some of the most important, most unique, and most recognizable lightsabers from the Star Wars Universe."
Note that these aren't all of the lighsabers; undoubtedly someone's favorite from the Expanded Universe has been left out.