The blade is made up of a few plastic tubes that can extend or collapse. The handles seem to pretty much be cheap, multicolored flashlights that the "blade" could screw onto. With two C batteries, you'll feel just like Obi-Wan!
Here's two of the colorful ones, along with a blade that's missing its flashlight, er, uh, handle.
These sometimes come with a white blade, which makes it look less like Bozo's lightsaber.
There's no dates on these things. Some mention China and/ or warnings about mixing battery types and such, but that's about it.
The one below is called the Laser Sword. I like it more than the ones above because, of course, it's in much better condition. I picked it up at Toys R Us new so it hasn't been played with or beaten relentlessly.
This one gets a little fancier, too. It can "alternate between 6 different light settings!". Judging by the picture on the card I'd say that the "light settings" involve different colors.
Also on the card/ tag it tells us that it can telescope to 34 inches (86.36 centimeters) long. It also says, "lights up! try me!", although "try me!" has been covered with a yellow sticker. Maybe they visioned kids swinging a glowing sword around inside a store and figured that wasn't a very bright idea (no pun intended).
The back of the tag explains how to work the six light settings. "Press button to activate light. Continue to press button to change through six different light settings. To turn off, press one time after going through each light setting.". The back also shares a bit of information as to who, what, when, and where. It states, "MANUFACTURED FOR NOTEWORTHY", "2010 NOTEWORTHY", "CHATSWORTH, CA 91311", and of course, "MADE IN CHINA".
On the sword's handle it says, "13510 34087S", whatever that means, and also, "NOTEWORTHY" and "MADE IN CHINA". Some of you may find some of this info noteworthy (pun intended).
I know there's a Mighty Morphin Power Rangers sword, too. This comic book ad calls it an "Expandable Lighted Power Sword".
While at a garage sale, I saw telescoping sword toy with a Six Flags logo on the handle. It seems safe to assume that that particular toy could originally be obtained at a Six Flags park. At a church sale I spotted a Walt Disney World sword, too.
Below are some mini telescoping lightsabers. They're shorter and thinner than the ones above.