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RGBW LED strip with cool white

LED strips are unbeatable as indirect lighting. Cold white with 6,000 Kelvin is reminiscent of daylight at midday. This colour temperature has an activating effect on the organism and at the same time increases concentration. The objects in the environment shine in intense colours. For this reason, companies and shops use luminaires in cool white. This keeps employees awake and alert, even during the night shift when no daylight floods the rooms from outside. Goods are presented in a more appealing way, encouraging people to buy. Coloured LED strips can also be used to create stylish and elegant accents. The reception of a company, for example, looks completely different with indirect blue light than with purely cold white luminaires.

What is the light colour of RGBW LED strips?

Light colour refers to the inherent colour of the light produced by a light source. It is composed of spectral colours, the proportion of which determines the colour rendering: White light can be perceived as warm, but also as cool. Light colour is therefore not blue or red light, but the composition of white light and its tendency towards warm white or cool white. To avoid confusion, the term colour temperature has become established.

Definition of colour temperature for RGBW LED strips

The colour temperature is a measure of the colour impression of a light source and is given in the unit Kelvin (K). This unit goes back to Plank’s radiator. A jet-black body is heated to such an extent that it itself becomes a source of radiation. The underlying colour at a certain temperature in Kelvin is then regarded as the basis of measurement, which can be read off a colour temperature scale. The colour temperature scale begins with a low Kelvin number in the red (warm) range, continues through so-called factual or neutral daylight white with 4,000 Kelvin and ends in the bluish range (cold) with high Kelvin values.

Warm white light with 2,000 to 3,000 Kelvin is preferred for living rooms that are used for cosy living and relaxation. 3300 to 5300 Kelvin are suitable as neutral light for corridors, offices, reception areas, waiting rooms and salesrooms. The lighting ambience here is rather businesslike. Daylight white with 5,400 Kelvin resembles natural lighting conditions. It has a friendly stimulating effect and promotes brain activity, which is why it is often used in classrooms, hospitals, laboratories and industry. 6,500 Kelvin imitates cool daylight even better and illuminates kitchens, bathrooms, production and sales rooms naturally. Values above this correspond to daylight at midday and are useful wherever a lot of attention and good visibility is required: Seminar rooms, libraries, electrical engineering.

What is the colour temperature of daylight?

The more Kelvin a colour temperature has, the bluer the light. This also means that the lower the Kelvin value, the redder the light. A deep blue sky corresponds to about 10,000 K, a sunset to more like 3,500 K. The middle range between 5,500 and 7,500 Kelvin is closest to daylight at the highest position of the sun and a clear sky.