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LED lighting guide: How to use human-centric lighting in offices

LED lighting guide: How to use human-centric lighting in offices

By Srabani Sen, BizLED Bureau

Mar 24, 2016: The ways of lighting an office has direct impact on the productivity of the employees. The color tunable LED luminaires, changing color temperature, and the illumination level have impact on our health. Besides these, there are other factors which all come together to form the human-centric lighting.

Human centric lighting simulates daylight over the entire day?from clear, blue morning skies, to sunset. This is achieved by gradually changing the spectral colour temperature as the day progresses. This helps to improve concentration and increase productivity.

LED lighting guide: How to use human-centric lighting in offices

Scientific studies have revealed that human-centric lighting or biorhythmic lighting can increase productivity by about 20% and staff motivation can improve significantly.

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Three inter-dependent parameters

The key idea is to synchronise the lighting with the employees? circadian rhythms, for example, some airlines are using artificial lighting to reduce the impact of jet lag of the passengers. These techniques are called biodynamic lighting.

Three parameters that are inter-dependent control the effect of light on humans. The most important is the spectrum and it is well known that the blue wavelengths are the biologically active parts. The illuminance level, which is also known as ?intensity?, plays an important role. Illuminance is connected with the timing, duration and previous adaptation state.

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Ways of lighting an office

There are various ways of lighting an office with the human-centric angle. Human-centric lighting also saves energy with the help of, for example, measures like daylight harvesting.

Go for vertical illumination, also called cylindrical illuminance, which is not only good for people?s faces, but also make a space look light and airy.

You can have LED lights that allow the user to control the lights to the maximum. These lights can be easily controlled to suit changes in the office design. Usually, one unit can illuminate two workstations, with 75% upward light distribution and 25% downward light distribution. These lights can be controlled by switches mounted on the shaft. The LED lights are vary in CCT from 3000K to 6000K.

If upward light distribution is more, the ceiling will be very well illuminated, which, in turn, will make the space look bigger. It will also illuminate the workstation quite well if the low-glare prismatic optics are adjacent to the workstation.

You can also go for recessed 600 mm x 600 mm panels with micro-prismatic optical control. These panels are found with DALI controlled system and its CCT can vary from 2500K to 7000K with an Ra >90.

You can find LED panel lights that are fully automated and vary in illuminance and CCT. These LED panels can brightly illuminate the whole workspace, walls and the ceiling uniformly.

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