Terminologies

Compact Fluorescent Lamp (CFL )- The general term applied to florescent lamp that are single-ended and that have smaller diameter tubes that are bent to form a compact shape.

Warm White – A description of white light with ratings between 2700K and 3500K, silmar to a slightly yellow light.

Cool White – A description of white light with ratings between 4000K and 4500K, crisp white light.

Daylight Lamp – A description of daylight light with ratings between 5000K and 6500K, silmar to a daylight light slightly blue light.

Beam angle – This refers to the direction of the light, wide (flood) or narrow (spotlight).

Dimmable – Whether or not the lamp lumens can be varied while maintaining reliability.

Discharge or HQI Lamp – A High Intensity Discharge lamp that produces light by using an electric arc, rather than a filament, to create illumination.

Electromagnetic Ballast – A low frequency (50 or 60 Hz) ballast that uses a “Core and Coil” assembly to transform electrical energy (voltage and current) to start and operate fluorescent and high-intensity discharge (HID) lamps.

Fluorescent Lamp – A halogen lamp is an incandescent lamp with a filament that is surrounded by halogen gases, such as iodine or bromine. Halogen gases allow the filaments to be operated at higher temperatures and higher efficacies. The halogen participates in a tungsten transport cycle, returning tungsten to the filament and prolonging lamp life.

Halogen Lamp – A halogen lamp is an incandescent lamp with a filament that is surrounded by halogen gases, such as iodine or bromine. Halogen gases allow the filaments to be operated at higher temperatures and higher efficacies. The halogen participates in a tungsten transport cycle, returning tungsten to the filament and prolonging lamp life.

High Pressure Sodium (HPS) Lamp – High Intensity Discharge light source which produce light by an electrical discharge sodium vapor operating at relatively high pressures and temperatures.

Lumens(LM)- The international (SI) unit of luminous flux or quantity of light and equals the amount of light that is spread over a square foot of surface by one candle power when all parts of the surface are exactly one foot from the light source. For example, a dinner candle provides about 12 lumens.

Ultraviolet (UV) – Electromagnetic radiation with wavelength shorter than that of visible light.

Ballast – The component that controls the operation of a lamp from a specified low or high voltage AC or DC source (Typically between 12 and 240 volts).

Ballast Lumen Factor – The ratio of the light output of the lamp in emergency operation compared with the light output of the same lamp operated by a reference ballast at its rated voltage and frequency.

Battery – Secondary cells providing the source of power during mains failure.

Battery Capacity – The discharge capability of a battery, being a product of average current and time, expressed as Ampere-hours (Ah) over a stated duration.

Design Voltage – The voltage declared by the manufacturer to which all the ballast characteristics are related.

Maintained Lighting – The lights continue to function when the power supply to the mains lighting fails.

Non-Maintained Lighting – A luminaire which isn’t used normaly but automaticaly turns on when the power supply to the mains lighting fails.

Escape Route Lighting – Lighting provided to ensure that the means of escape can be effectively identified and safely used when a location is occupied.

Emergency Exit – The way out of a building, which is intended to be used at any time whilst the premises are occupied.

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