Lamps and Light Fittings:Lamps

Lamps

The most common types of lamp encountered today are:-

· Filament Lamps, known as GLS lamps. ( General Lighting Service ).

· Tungsten Halogen Lamps, known as TH lamps

· Fluorescent Lamps, known as Low Pressure Mercury Vapour lamps sometimes abbreviated to MCF ( M = Mercury, C = Low Pressure, F = Fluorescent ).

Life Expectancy of Lamps

A general rule is that the life expectancy of a GLS lamp is approximately 1000 hours and the life expectancy of a fluorescent lamp is 8000 to as high as 15000 hours.

Note: These are average life expectancies, there are a number of conditions that influence life expectancy e.g. supply voltage, working position, ambient temperature, atmospheric conditions etc.

Types of Lampholder in Common Use

Bi-Pin, Bayonet Cap and Edison Screw type lampholders are commonly used in industrial applications. In these cases the relevant ETCI Rules will apply.

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