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Introduction to LED

 

 

 

Your right business partner

DSTiTAC BV

What is LED

 
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New Technology

 

 

The lamps that have been used since the invention of the incandescent light bulb some 130 years ago are finally becoming obsolete with the rapid development of LED, Compact Fluorescent and HID light sources.

 

What are the advantages of using LED lighting?

LEDs can have exceptionally long lifetimes with up to 50,000 hours of useful life (although time to complete failure may be much longer.) This drastically reduces maintenance costs especially compared to halogen luminaires. Fluorescent tubes are typically rated at about 10,000 to 15,000hours and halogen lamps at 1,000 to 2,000 hours. LEDs are far more efficient and produce more lumens per Watt than halogen lamps.

 

Due to the complete lack of ultraviolet (UV) radiation and infrared (IR)radiation, LED is ideal for display lighting as it does not radiate heat in the direction of the illuminated object, it can therefore be used to illuminate materials that fade easily - food, works of art, etc.

 

As LEDs are solid state components, they are resistant to damage by impact shock or vibration unlike fluorescent and incandescent lamps which are fragile. LEDs are ideal for use in applications that are subject to frequent on/off switching, whereas fluorescent lamps which can burn out quickly when switched frequently and HID lamps require several minutes before re-starting.LEDs light up very quickly, typically in milliseconds. Dimmable and RGBcolour changing versions are also available for flexibility and control in any lighting application.

 

In what applications can LED lighting be used?

 

Display lighting where halogen may fade sensitive materials. Underwater lighting where a low voltage supply for safety is required. Outdoor lighting where  colored  effects are desired to enhance outside spaces. Sign lighting, LED strips can  be used to  light  signage in many different colors. Low level lighting where halogen  light sources may pose a danger to touch due to high temperatures. Architectural lighting where LEDs  can  be used  in applications which traditionally used expensive and inflexible neon or cold cathode light sources.

 

Will LED technology save you money?

 

With todays spiraling energy costs the end user will appreciate lighting cost savings of up to 70% per annum with energy saving LED products compared with halogen lighting. The added benefit of reducing CO2 coupled with a complete absence of Mercury in LEDs, unlike fluorescent lamps, makes LED technology environmentally friendly.

 

LED (Light Emitting Diode)

 

A diode is a component that allows an electric current to flow in one direction, but blocks it in the opposite direction.  An LED is a diode which  emits light when an electric current passes through it

 

 

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LEDs are solid state semiconductor devices.  LED  illumination  is  achieved  when  a semiconductor  crystal is  excited so  that it  directly produces  visible light in a desired wavelength range (colour).

 

LEDs are small, typically 5mm.

 

The light from an LED is practically a pure, single color. A  green LED produces green light only, a red LED only red light, and so on. It is the material of the LED chip that determines the color.

 

LEDs are driven by direct current, and the amount of current determines the brightness.

 

The brightness of the LED is proportional to the current flowing  through  the LED,  more current, more light. In order to create a full range of colors  including white light, we need to use a selection of different colored LEDs  that  can be combined in various proportions to create a wide color pallet

 

Features & Benefits of LED

 

   LEDs are extremely efficient low energy light sources

   In 2005 white LEDs had reached outputs of over 30 lumens/Watt and colored

versions 50 lumens/Watt. The light gains continue to grow, doubling about every two years

   Long operational life of up to 50,000 hours

   Compact light source, no other lamp possesses such small dimensions for a comparative light output

   LEDs do not emit ultraviolet (UV) or infrared (IR) radiation. They do not radiate heat in the direction of the illuminated object, they can therefore be used to illuminate materials that fade easily, food, works of art etc.

   LEDs are durable against impact and vibration

   LEDs can be dimmed

   Colored light can be produced effectively - over 16 million colors

 

 

Common Applications

 

   Display lighting - compact displays are possible with low operating temperatures

   Display case, museum and shop lighting - illumination of sensitive objects at close range with ultraviolet (UV) and infrared(IR) free light

   Underwater lighting - low voltage supply for safety and low maintenance

   Outside lighting - colored effects to enhance outdoor spaces

   Sign lighting - strips of LEDs can be used to light signage in many different colors

   Low level lighting - LED luminaires are cool to touch and are therefore suitable for us in domestic situations where children may come into contact with them

   Architectural detail lighting - LEDs can be used in applications which traditionally used neon or cold cathode

 

 

LED Color Variation

 

Due to the manufacturing process of LEDs they are graded into Bins of like color temperature. Even within these Bins it is impossible to guarantee the color temperature of the light.  This color variation can be discernable to the human eye and this should be taken into account when designing lighting plans using LED technology.

 

What is RGB?

 

RGB stands for red,  green and blue.  It is a commonly used term to denote a module or luminaire that  has the  ability to change color,  up to a maximum of 16 million variations depending on the controller Features include color phasing, switching and static colors

Choosing The Right Light Source

 

To suit the demands of todays varied lighting installations, fittings are being designed with a growing number of different light sources - each creating a different environment. Choosing the right light source for the right application is critical.

Low Energy, LED, Halogen, Fluorescent, or HID lamps are all available in a variety of wattages and colors

See below for our quick start guide to choosing the right light source for your installation.

The two columns to the left of the lamps help to give you a better understanding of how powerful the lamp light is (Light Intensity Rating) and how efficient the lamp is (Efficiency Rating).

 

Low Voltage Halogen

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Features
Wide choice of fittings, wattages, colours & bean angles. Smaller sizes of reflector lamps
Applications
Recessed, submersible and spotlighting
Efficiency Rating: 2/5
Intensity Rating: 4/5

Mains Voltage Halogen

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Features
Wide choice of fittings, wattages, colours. Transformer not required

Applications
Wall and Spotlighting

Efficiency Rating: 2/5
Intensity Rating: 4/5

Compact Flourescent

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Features
Long lamp life. Wide choice of colour temperatures

Applications
Posts, Bollards and recessed wall lighting

Efficiency Rating: 3/5
Intensity Rating: 3/5

Linear Flourescent

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Features
Long lamp life. Even linear light output.

Applications
Wallwashers and walkover lighting.

Efficiency Rating: 4/5
Intensity Rating: 3/5

High Intensity Discharge

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Features
High energy efficiency and high power. Wide choice of colour temperatures

Applications
Wallwashers and flood lighting

Efficiency Rating: 4/5
Intensity Rating: 5/5

Low & Mains Voltage LED

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Features
Exceptionally long lamp life. cool operating temperature. Low voltage suitable for submersible lighting

Applications
Wall, recessed, wallwashers and submersible lighting

Efficiency Rating: 5/5
Intensity Rating: 1/5

 

 

About Ormrod Lighting & Electric

 

 

 

 

Originally known as Stanwall Electric until 1986, Ormrod Lighting & Electric  is now the pre-eminent electrical wholesaler of residential and commercial lighting in West London with lighting showroom facilities and electrical and lighting trade counter at 173/175 Chiswick High Road

 

 

 

 

 

 

 

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