LED Lighting - Terminology Explained

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Benefits of LED Lighting Saving Money and the World:

If you are new to the world of LED Lighting, this guide will help you to decypher the many confusing abbreviations and terminologies used to describe LED products specifications, features and benefits.
No longer will you have to glaze over when reviewing the spec sheet for LED products. You can now easily pin-point your selection and be confident that the product you have selected fits your requirement and gaining the benefits of LED lighting including:
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Benefits of LED Lighting Saving Money and the World:

  • Energy Efficient Long Lifespan
  • Compact Size
  • Lower Temperature
  • ECO Friendly


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A Better Way to Illuminate with:

  • Safe Low Voltage Design
  • Quality Components
  • No bulbs or tubes to replace
  • Super Bright illumination
  • Ultra Energy Efficient
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Watts

Watts (W) is the unit of power used to describe the energy consumption rate.
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Lumens

The lumen can be described as a measure of the total "amount" of visible light in a defined beam or angle, or emitted from a source.
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Beam Angle

The beam angle of an LED bulb or lamp is defined as the angle at which light is emitted from a given light source. A more technical definition specifies it as the angle between those points on either side of the beam axis where intensity decreases to approximately half of its maximum illumination.
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Colour Rendering Index (CRI)

Colour Rendering Index (CRI) is a measure of how accurately a light source illuminates objects' true colours. A simple definition of Colour Rendering Index (CRI) would measure the ability of a light source to accurately render all frequencies of its colour spectrum when compared to a perfect reference light of a similar type (colour temperature). It is rated on a scale from 1-100. The lower the CRI rating, the less accurately colours will be reproduced.
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Colour Wavelength (nm)

The colour of the light we see is determined by its wavelength, which in turn is often used to denote the colour of light. The wavelengths associated with light are tiny and measured in nanometres (nm) - billionths of a metre. LEDs produce light that is almost coherent, meaning that it is almost all on one wavelength, giving very pure colours. Here is an approximate guide to the colours of light and their wavelengths.
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Colour Temperature (K)

Colour Temperature (K) - Is a measurement of a light sources shade of white against the Kelvin Colour Temperature Scale with the symbol ‘K’ used to reference the measurement. It describes the relative colour appearance of a white light source, indicating whether it appears more yellow/gold ("warm") or more blue ("cool"), in terms of the range of available shades of white. Many people are now familiar with the idea of a "warm" white or a "cool" white being offered by fluorescent and other light bulbs. These bulbs have vastly different colour temperatures. The "warm" bulb often has a colour temperature of 3,000K and casts a more orange/red light on objects. Because you normally associate warmth with red or orange objects, this accounts for the "warm" descriptive name, even though it is a cooler (lower) temperature on the Kelvin scale. A "cool" white bulb commonly has a colour temperature of 4,100K and higher on the Kelvin scale. This is in the low range of blue colour, similar to ice, therefore earning the "cool" description.
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Ingress Protection (IP)

Ingress Protection (IP), classifies and rates the degree of protection provided against intrusion, dust, accidental contact, and water by mechanical casings and electrical enclosures.
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