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General Lighting Information

Lighting Definitions

Light Sources


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Light Sources

The incandescent lamp

The incandescent lamp is an older lighting technology and operates with an electric current that runs through a filament of tungsten and increases its
temperature until it radiates light. The filament is protected from oxidation
by a glass bulb, which is filled with a low pressure inert gas such as argon, or
neon. It is the most common type of lamp, as well as the least energy efficient.


It produces a good quality of light, similar to sunlight, with a low colour temperature and generally has a shorter lifetime when compared to other lamps.




Halogen lamps:


While halogen lamps are similar in operation as incandescent lamps, the
difference is that halogen lamps are filled with Halogen gas. This gas protects the filament allowing an increase in the temperature of the filament, therefore increasing the efficacy of the lamp when compared to a classic
incandescent light bulb.

 There are two types of halogen lamps:
- Main Voltage lamps which run with on a 220V or 240V

- Low Voltage lamps that need an adaptor and run on a 12V or 24V





Fluorescent Lamps:

This lamp technology is fundamentally different from other lamps as there is no heated filament within the bulb. Instead, a gas-filled tube runs an electric current between the electrodes allowing the ionization of the gas that emits ultraviolet radiation.  This radiation is then transformed into visible light by the phosphor powders.


Fluorescent lamps are an efficient way to produce light as they have a long
lifetime and do not produce heat.


Fluorescent lamps are divided in several categories:

-   Linear Fluorescent such as T8 or T5 tubes, mainly use in industrialareas, offices, public places, etc.

-      CFL or Compact Fluorescent Lamps that are designed to replace
incandescent bulbs.

-       Circular Tubes.




Light Emitting Diodes or LED:

LED technology is expected to become one of the main lighting sources to
be used in the future as the LED is one of the more efficient light sources
and has a long lifetime.  This type of lamp creates light by an electro-chemical process through a solid state diode. A LED is a monochromatic source, so that three LED’s are needed to produce white light (usually Red,
Green and Blue LED), or a single blue or UV LED with phosphor powder mixed
in the lens covering the LED.


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