Kelvin, lumen, lux – Schneider mirror cabinet variety - W. Schneider+Co AG

KelvinThe light colour

The light colour can be measured and is given as a colour temperature in kelvin (K):

The light colour

At low kelvin values, the light has a much higher red component, making it appear warmer. The higher the value, the larger the blue component, and the colder the appearance of the light.

The Schneider mirror cabinets with what is called Tunable White – an adjustable light colour – are unique on the market. Their enormously wide light spectrum ranges from 2000 to 6500 K. Virtually no other manufacturer offers mirror cabinets and illuminated mirrors whose light colour can be changed so comprehensively.

LumenThe luminous flux

Light intensity is also called luminous flux. It is measured in lumen – directly on the illuminant. The higher the lumen value of a light source, the brighter it shines.

The state-of-the-art LED light in Schneider mirror cabinets is several factors more powerful and at the same time consumes much less energy than conventional fluorescent luminaires or light bulbs. The LED luminaires of the former achieve around 130 lumens per watt, while a 100-watt light bulb only achieves around 15 lumens per watt. This reduces electricity costs by 50% compared to conventional luminaires – and at the same time a much brighter maximum luminous flux can be enjoyed.

Our mirror cabinets and illuminated mirrors provide a dimmable light of up to XXXXX lumens.

LuxThe illuminance

We can compare the luminous flux of a light bulb – given in lumens – to the flow of water in a shower. As you move your hand away from the shower, it receives less water. In much the same way, the farther your book gets from the bedside lamp, the less light there is to read. The lumen is thus not the ideal unit of measurement to describe the visual comfort of a workplace, for example. This requires a different unit of measurement, the lux (lx), a measure of illuminance, which describes the luminous flux received by a surface per unit area. One lux is the amount of illumination provided when a luminous flux of one lumen is evenly distributed over an area of one square metre (scientific definition). To go back to the example of the shower, lux would indicate the amount of water that lands on your hand.

Our eyes can adapt to highly variable levels of illumination, from 100,000 lux on a sunny summer day to under 1 lux on a full moon night. Corridors and staircases generally receive 100 lux, bathrooms and WCs 200 lux, living rooms between 100 and 400 lux and workplaces between 200 and 800 lux. As the need for precision in someone’s work increases, so too does the amount of light required.

The essential question is that of defining the necessary level of lighting in a given room (e.g. a bathroom) and for a given purpose (shaving, putting on make-up, brushing your teeth, etc.).

Starting from the principle that the darkest area in the bathroom should receive at least 200 lux, we ran a simulation. We determined, by basing our simulation on maximum lighting power and taking into account the size of the bathroom and the colour of its furnishings, which mirror cabinets could be installed and would provide enough lux so that no additional sources of light (e.g. ceiling lights) would be necessary. You can find all of the answers in the downloadable brochure below.

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