Apparently there is no one that can invent a real lightsaber originated from Star Wars. But if you want a practical one, the Star Wars lightsaber flashlight should be suitable for you.
Theses are two Star Wars themed flashlights based on the lightsabers that respectively belong to Darth Vader and Anakin Skywalker. Each lightsaber measures 1.5 inches in diameter by 10 inches tall, and features accurate details. When turning it on or off, you can hear sound effects delivered from the lightsaber flashlight. Of course, unlike the lightsaber powered by the Force, the lightsaber flashlight requires three AAA batteries.
The Star Wars lightsaber flashlight is available in two types, each one is priced at $25.95 USD. If you’re interested, jump to neatoshop or ThinkGeek for more details. Additionally, if you need more lightsaber inspired gadgets, you might like to check the lightsaber bottle opener, the homemade lightsabers and more more “” tag.