Guide to lighting facts

Here's what to consider when choosing lighting!

There are many concepts to consider when choosing lighting. The most common are brightness, color rendering, light distribution, color temperature, glare and energy efficiency. A brief summary and explanation of the different concepts that you may encounter and consider when choosing a lamp follows below.


Highly durable light-emitting diodes.


Luminous flux – the intensity/perceived strength of the light source.


Color temperature is measured in Kelvin degrees (K) and describes the color of a light source from warm reds to cool blues, see also below under the term CCT.


Measurement of the amount of light at a defined surface. E.g. 40 cm distance which indicates illumination intensity.


Means that the light is dispersed at an angle from the light source, known as light diffusion, so that the lamp does not have to be positioned exactly where the light should be. A great advantage for larger desks, but also when you have a small workspace and don’t want the lamp to get in the way.


Indicates the risk of glare effect.


CCT is about being able to change the temperature of the light from warm to warm white or cold light. It is also this function that mimics the different light temperatures of the day. During the morning hours, it is good to have a cooler light to get more alert and as the afternoon and evening progresses, we should use a warmer light to prepare the body for rest. But we can also use different color temperatures to adjust our mood for a particular activity. Warm white light: 5300K Daylight: 6500 K


Color rendering (number less than 80 = high risk of color distortion compared to daylight color).


The LED module’s light color quality or chromaticity is a measure of light color dispersion. The deviation in color is indicated by MacAdam ellipses SDCM (Standard Deviation of Color Matching) according to the CIE 1964 standard. The MacAdam system grades chromaticity on a scale of 0-10, with 0 being the best chromaticity achievable.


Shows the energy class of the lamp. New LED lamps are F-rated.


Lumen describes how much light the lamp produces. Higher lumens means more light. Wattage, sometimes mistaken as a measure of brightness, is actually a measure of energy use. A 100-watt bulb is equivalent to about 1200 lumens, while a 40-watt bulb is equivalent to about 400 lumens.

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