Common lighting terms

Some common terms used within lighting below.

LAMP
A device for giving light. Referring specifically to the emitter rather than the holder.


LUMINAIRE
A complete electric light unit, consisting of the lamp and its holder.

LUMEN
The unit of luminous flux: a measure of the total quantity of visible light emitted by a light source.

LUX
The SI unit of illuminance, equal to one lumen per square metre.

PARASITIC POWER
The power consumed by the sensor even when the luminaire is shut off.

LUMEN DEPRICIATION
Lumen depreciation is the luminous flux lost over time, and thus the complement of lumen maintenance. Lumen maintenance compares the amount of light produced from a light source or from a luminaire when it is brand new to the amount of light output at a specific time in the future.

REMOTE POWER SUPPLY
An emergency luminaire designed to operate from a remote central battery system.

SELF CONTAINED
An emergency luminaire with integral battery charger, inverter (where used) and controls for sensing power failure and changing over to the built in emergency batteries and vice versa.

MAINTAINED
An emergency luminaire in which the single emergency lamp operates on both normal and emergency supplies.

NON MAINTAINED
An emergency luminaire in which the lamp operates on emergency supply only, on failure of the normal supply.

SUSTAINED (COMBINED)
An emergency luminaire containing separate lamps for mains and emergency operation.

WHAT DOES DALI MEAN?
Digital Addressable Lighting Interface. Each DALI fitting has a ballast connected via a DALI line and addressed with its own unique address. This allows a DALI control system to control and receive feedback from any light fitting individually.

WHAT CAN DALI DO FOR YOU?
DALI can reduce the initial installation costs of a lighting control system. It also allows ultimate flexibility as any fitting can be programmed to be controlled regardless of its location on the DALI universes. What this also means that changes to a home or office can be made without needed to change wiring. A programmer can simply attend onsite and modify the control as required. It is designed to easily integrate the equipment of other third party products.

IS THERE IS A LIMIT TO THE NUMBER OF DALI DEVICES ON A SINGLE DALI UNIVERSE?
Yes there is a limit of 64 DALI devices on a single universe.

What are the benefits of our lighting controls system?
- It's an Energy-efficient system
- Intelligent and Ultimate Power
- Economical
- Sophistication
- Reliable and maintainable
- Flexible Design
- Ease of installation and Configuration
- Full capability of integration with other systems
- Customisable and advanced functionality for the users comfort

WHAT ARE LEDS?
LEDS are light emitting diodes they produce light by conversion of electrical energy directly to light by the movement of electrons within the material of the diode. These are electronic components and are important because they are replacing the most conventional light sources as they or efficient and use low energy. LEDs are a solid-state lighting that is used because the electronics produce light directly from solid materials in which the electrons are embedded. Other technologies such as the fluorescent technology require a gaseous discharge medium to initiate production of light.

WHAT IS MEANING OF FUTURE-PROOFING OF LED PRODUCTS?
LED technology is constantly changing like any technology. It continues to improve the performance on a daily basis. They are manufactured so that you can easily switch from one generation to the next improved generation without major retooling of changes to the luminaire design offering full compatibility with drivers making any set up future proof.

WHY DO LEDS HAVE A HIGHER INITIAL COST THAN CONVENTIONAL LIGHT SOURCES?
LEDS offer long lasting efficient light to end users. Apart from the LED chip itself which has sapphire and gallium in the semiconductor, the process of the packaging with materials like ceramic, rare earth phosphors, silicone, solder and good wire add to the overall cost. White LEDs require further tests for calibration and standardisation.

WHAT ARE THE ECONOMIC ADVANTAGES OF USING LEDS OVER CONVENTIONAL LIGHT SOURCES?
Initially the cost of the conventional light source is less than LEDs but the operational and maintenance cost of the lighting system is cheaper in the long run. LEDs last longer and reduce maintenance and lamp replacement cost. This reduces the cost of labour to replace the lamps at the end of the lamp life as they consume less energy. 

WHAT ARE THE ADVANTAGES OF DIMMING LEDS?
LEDs are more efficient than most other light sources and use less energy. They do not contain hazardous materials and have a longer lifespan hence reduce the frequency of lamp disposal.

DIMMING LEDs HAVE THE FOLLOWING ADVANTAGES:
- Energy Saving because the less energy used will reduce output levels
- LEDs have an extended life span
- The electronic components run cooler. Which increases the life of the phosphor coating that is used to produce white light.
- Can create ambient light presets to create mood settings.
- A flexible system with a multipurpose room. A room can be a reading or office space that can then turn into a presentation area by dimming
- Designed to increase productivity by individual control.

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