A light bomber is a relatively small and fast class of militarybomberaircraft which were primarily employed before the 1950s. Such aircraft would typically not carry more than one ton of ordnance. The dedicated light bomber disappeared as fighters were able to carry the same bombloads while also able to carry out other missions.
Prior to World War II, engine power was so meager that there were several types of bombers: light, medium, and heavy, each tuned to a particular performance and mission niche. As fighters grew in size and power to be able to carry the same sorts of loads at even greater speeds, light bombers were replaced around the 1950s and the term fell from general use.