Lightscimitars were developed around 1000 BBY and in terms of Energy weapons are relatively new. The Lightscimitar was accidently born when the gravity field generator in Jedi master Sen Sai Tul's lightsaber weakened. The generator weakened due to the age of the component, and this led to the blade becoming kinked. The Jedi disregarded it as a failure of an aged component, and took to ensuring the re-design of all gravity field generators.