ABSTRACT
To clarify the terminology: lamp is the source of light (bulb or globe are not technical terms). The lamp is usually inside a luminaire, (which in the past was often referred to as a light fitting), although many lamps can be used without a luminaire, just fitted into a lamp holder. Lamp holders are the electrical connectors, into which the lamp is inserted or screwed. The generally used ones are the BC (bayonet caps) or the ES (Edison screw), but many other types are available for specialized purposes.
