Complex sentence: The Edison screw base became popular and eventually displaced competing standards for lamp bases for general lighting purposes in several places, especially in North America; in Britain and countries with a historical connection to Britain, the bayonet cap (BC) is the usual mount.
Split into simpler sentences: The Edison screw base became popular and eventually displaced competing standards for lamp bases for general lighting purposes in several places, especially in North America. In Britain and countries with a historical connection to Britain, the bayonet cap (BC) is the usual mount.