Impact of light

When we speak of light, we normally mean daylight. Natural sunlight is always present in varying colours and intensities. Even behind thunderclouds or in a fog. And certainly in the stimulating morning light and in the soothing, warm colours of sunsets. Although we may not realise it, light has a significant influence on many processes inside our bodies. The reason is that it regulates the production of various hormones.

For example, the sleep hormone melatonin, which ensures that we relax in the evening, calm down and ideally fall into a refreshing sleep. But what about those among us who, due to their occupational situation or other circumstances of life, can only receive few impulses from natural daylight, simply because they spend too little time out of doors? For all such people, and of course also for those who appreciate good working light, LUCTRA® has revolutionized lighting.

We offer the proof.

A clinical study led by sleep researcher Dr. Dieter Kunz at the St. Hedwig hospital in Berlin has provided evidence that the biological effectiveness of LUCTRA® workplace lamps is based on the production of the hormone melatonin. LUCTRA® is the first workplace lamp for which such systematic evidence has been established.

The study was conducted in July and August 2014 with 16 participants. In the test period, the test persons were each exposed on five evenings to one of five different lighting situations. The biological effectiveness of the lighting was measured on the basis of the melatonin content in their saliva. In medicine, the sleep hormone melatonin is currently recognized as the most reliable indicator for the influence of light on human beings. In addition to saliva samples, the test persons gave assessments of the visual comfort of the various lighting situations.

The complete study is available for download on:

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Owl or lark?

Every individual has a personal daily rhythm, which is “circadian”, that is, roughly synchronised with day and night. We all know people who are already full of energy early in the morning, while others need a wake-up push to start their day. And we are all familiar with the consequences of a disrupted circadian rhythm.


Follow your rhythm.

The effect becomes particularly obvious in the case of jet lag, when our body is forced to switch abruptly to a different day-and-night rhythm. Insomnia, irritability and lack of concentration are some of the immediate consequences.

More serious, however, is the effect of social jet lag, which is caused by continuously living against our internal clock. The long-term consequences may be severe to the extent of leading to depression or diabetes.



The total effect of light in one lamp.

Modern LED lighting almost completely covers the colour spectrum of sunlight. That means this light source can have a stabilising effect on our biological rhythm. Suitable LED light provides the body with the light signals which set its internal clock even in an indoor environment.

 


Brightness alone is not enough.

Especially in an office environment, illumination and the quality of lighting are vital for the workers. A survey revealed that more than 60 per cent prefer light intensities from 800 lux upwards. Employees are more content, and see themselves as having a higher level of well-being when there is better individual lighting adjustment.

This includes the light intensity as well as the variable colour temperature – the alternation between neutral (cold white) and warmer (warm white) light. All lamps from the LUCTRA® range deliver both light intensities of 1,000 lux and a colour spectrum from 2,700 to 6,500 Kelvin. The VITACORE® electronics and the VITACORE® APP make it very easy to use and control these functions.


In addition to personal perception of the quality of workplace lighting, there are a number of statutory regulations. Here, flexible office concepts present the greatest challenge. Both the DIN EN 12464-1 and the ASR 3.4 standards lay down the requirements for an office workplace. By comparison to the preferred light intensity of 800 lux, workplaces should be illuminated with (a minimum of) 500 lux to comply with the DIN standard. Particularly demanding visual tasks sometimes require up to 750 lux. The lighting intensity requirements of at least 300 lux for the immediate environment are even lower.