Pulse cannons are standard armament on EarthForce installations and ships. They are either plasma based or particle based and can be used in offensive and defensive combat. Heavy pulse cannons are usually featured on the Omega class destroyers and can inflict severe damage even to the advanced White Star cruisers. Light pulse cannons are mostly part of fighter armament and the defence grid of Babylon 5. The firepower of a standard cargo bay pulse cannon is about 200 MW.