Lighting Terminology

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What are LEDs?

LED stands for Light emitting diode, LED lighting is very energy efficient and provides instant light at full brightness when switched on.

What is CFL?

Compact Fluorescent Lamp, also referred to as energy saving light bulbs.

What do ES, BC, SES, SBC stand for?

These are abbreviations for common light bulb bases:

  • ES = Edison Screw
  • BC = Bayonet Cap
  • SES = Small Edison Screw
  • SBC = Small Bayonet Cap

What is the difference between cool-white, day-light and warm-white?

Cool white and warm white refer to the colour temperature of the light being produced by the Led or a globe. Colour temperature is measured in a unit called kelvin (k). The warmer or yellow light have a low kelvin rating (2700k-3200k), whereas the cool white or daylight have a higher kelvin rating (4000k- 6500k).

What is a Lumens?

Lumen is a unit of measurement. It measures the amount of light from a light source.

What is Lux?

Lux is a unit of measurement. It measures the amount of light that falls on an object.

What does CRI stand for?

Colour Rendering Index (CRI) is defined as a light source’s ability to render colour using a number between 0-100. The higher the CRI, the better the light source renders every colour in the visible spectrum. To have what is generally considered good colour rendering, a source must be greater than 90 CRI.

What is a watt?

A watt is a basic unit of electric, mechanical or thermal power. The strength of a light bulb or fitting is measured in watts. A 25w globe uses 25w of power. Light fittings have a maximum wattage that can be used, it is generally on a sticker located near the lamp holder. It is recommended that you do not exceed the max wattage in any fitting.