One of the most important parameters LED lamp is the color temperature of the lamp, which fluctuates sufficiently in LED devices wide range... This term refers to the temperature at which a monochrome black body begins to emit the glow of a certain spectrum (corresponding in shade to the lighting that this lamp creates).

The lower the color temperature, the warmer the shade of its glow. For example, for a candle flame, this figure is 1500-2000 K, for an incandescent lamp - 2700 K, and for so-called cold daylight lamps - 6000 K and above. To choose lighting fixture based on its color temperature, it is important to know the information about it.

How does this indicator affect the perception of objects?

Modern manufacturers produce LED lamp with different indicators of color temperature. They all create different lighting, the properties of which can be used with specific purpose... Warm reddish yellow, pale gold or bluish white glow affects the visual perception of space, and emotional condition, into which a person enters, being in this room.

Choosing the right color temperature for an LED lamp can increase the visual appeal of the product and increase the customer's willingness to purchase. In museums competently organized lighting emphasizes all shades of color and features of the texture of the exhibit, which also attracts visitors. V in public places White light different color temperatures help create a suitable environment for morning, afternoon or evening hours.

The choice should be made in accordance with the task that is assigned to the lighting system:

2700 K... Devices with this indicator create a cozy, warm lighting. Recommended for restaurants, lounges, hotel lobbies and residential areas.

3000 K... It is a close to neutral white light with a slightly yellowish tint. Suitable for creating an intimate, friendly atmosphere in the room. Lamps with this color temperature are installed in offices, shops, libraries.

3500 K... Pure neutral light, in which the environment appears safe and inviting to the person. Such lighting fixtures are also good for offices, they are often installed in exhibition halls, bookstores, movie theater lobbies.

4100 K... It's already more invigorating cold light... It will be appropriate wherever it is required to provide a productive atmosphere, as well as a good color perception items. This is the color temperature that LED lamps installed in large supermarkets often have. medical centers, study rooms.

5000-6000 K... If the fixture produces harsh white light, close to daylight, then its color temperature is most likely in this range. Ophthalmologists do not recommend staying under such lighting for a long time and warn against using this type of LED lamps in the evening or at night. But for medical examinations, art galleries, museums and jewelry stores are cold daylight will be in place. It perfectly conveys all shades of colors, provides good visibility of objects and the environment.

Can an LED lamp give a glow of different temperatures?

Some manufacturers have established the production of lighting structures that emit a glow of different color temperatures. Their device allows you to adjust the shade of light in accordance with specific situation... This is very convenient and physiological, since warmer yellow lighting will be natural for the morning hours, and during the day you can eliminate the lack of light coming from the windows. artificial lighting a similar tone if necessary for work, reading, or creativity.

Lighting products occupy the largest group of electrical appliances in every room. The lamps are essential element everyday life and in the conditions of human labor. For general lighting in residential and non-residential premises, it is not recommended to combine different varieties lamps, as this is very harmful to the eyes. Do not use fluorescent fluorescent lamps and incandescent lamps at the same time.

The lighting characteristics of light sources include color temperature or color temperature. This is a conventional value that describes the color emitted by the lamp itself, compared to the black body color, which is a constant value. This characteristic is measured in degrees Kelvin (abbreviated K). In incandescent lamps, this indicator is close to the temperature of the incandescent body. Human vision perceives the light of lamps with different color temperatures in different ways, the higher the color temperature, the colder the emitted light is perceived.

for standard incandescent lamps with power from 40 to 100 watts, color temperature is 2700 - 2900K,

for halogen lamps incandescence color temperature is 2900 - 3100K.

for fluorescent lamps warm white color at a color temperature of 2700 - 3300K, white neutral light at a temperature of 3500 - 4500K, and cold white (daylight) light at 5000 - 6500K.

The gradually heated ideal emitter (black body) emits light of different colors depending on the temperatures. The color temperature of a lamp is the temperature to which it is necessary to heat the black body so that the tone of the light emitted by it is approximately the same spectral composition and color coloration as the light of a given source.

Range. According to Planck's formula, color temperature is defined as the temperature of a black body at which it emits radiation of the same color tone as the radiation in question. It characterizes the relative contribution of the radiation of a given color to the radiation of the source, the visible color of the source. It is used in colorimetry, astrophysics (when studying the distribution of energy in the spectra of stars). Measured in kelvin and mired.

Color temperature of some light sources

Colour temperature electric lamps.

Color temperature scale for common light sources

• 800 K - the beginning of the visible dark red glow of incandescent bodies;
• 1500-2000 K - candle flame light;
• 2800 K - incandescent lamp 100 W (vacuum lamp);
• 2800-2854 K - gas-filled incandescent lamps with a tungsten spiral;
• 3200-3250 K - typical filming lamps;
• 3800 K - lamps used to illuminate meat products in a store (they have an increased content of red in the spectrum);
• 4200 K - fluorescent lamp (warm white light);
• 4300-4500 K - morning sun and sun at lunchtime;
• 4500-5000 K - xenon arc lamp, electric arc;
• 5000 K - sun at noon;
• 5500 K - clouds at noon;
• 5500-5600 K - photo flash;
• 5600-7000 K - fluorescent lamp;
• 6200 K - close to daylight;
• 6500 K is a standard daylight white light source, close to midday sunlight;
• 6500-7500 K - cloudiness;
• 7500 K - daylight, with a large proportion of scattered from the clear blue sky;
• 7500-8500 K - twilight;
• 9500 K - blue cloudless sky on the north side before sunrise;
• 10,000 K - "infinite temperature" light source used in reef aquariums (actinium shade of blue);
• 15000 K - clear blue sky in winter;
• 20,000 K - blue sky in polar latitudes;

Fluorescent lamps

Typical color temperature ranges at maximum luminous efficiency of modern multilayer phosphor fluorescent lamps:

• 2700-3200 K,
• 4000-4200 K,
• 6200-6500 K,
• 7400-7700 K.

Application

• characterizes the spectral composition of the light source radiation,
• is the basis for the objectivity of the impression of the color of reflective objects and light sources.

For these reasons, it determines the color of objects perceived by the eye when viewed in a given light (psychology of color perception).

Light sources in the printing industry

To obtain the most accurate color image at all stages of production, it is often recommended to maintain a standard color temperature of illumination of 6500 K (source D 65): from order acceptance through the assessment of originals, scanning, retouching, screen proofing, digital proofing, color separation, analog proofing, printing of proof prints , to print circulation and final delivery of printing products.

The D 65 source with a color temperature of 6500 K has an ultraviolet component defined by the standard in its spectrum. Although the human eye does not perceive ultraviolet rays, many objects (including dyes) are capable of glowing under their influence. For example, without a UV component, the paper will not be so white (optical brighteners are introduced into it), and the advertising will not be so bright (it often uses

Lighting with LED lamps has a significant number of advantages that are difficult or impossible to offer with other lighting technologies. Many obvious benefits, such as dramatically reduced energy costs, reduced maintenance costs, long service life, and reduced overall heat generation, are generally well known. Another feature led lighting this is the color temperature.

Origin of the term

White is often described by reference to its color temperature. In the 19th century, the British physicist William Kelvin conducted experiments on heating carbon. Carbon changed its color depending on temperature from red to blue-white. In honor of William Kelvin, the unit for measuring color temperature is named, which is included in the international SI system of measurements.

Why is it important to choose the right color temperature for your LED lamp?

The reason is that color temperature affects the perception of the surrounding space. The color temperature of the candle ranges from 1500-2000K and creates a romantic atmosphere for most people.

For a restaurant, hotel, private house or apartment, the most suitable color temperature will be in the range of 2400-2700K, this color temperature creates a feeling of comfort.

In transitional places such as corridors, LED lamps with a color temperature of 3000-3500K can be installed. Warm white light is also useful to emphasize warm colors furniture, art and other items in the room.

The negative side of cold white Led lighting there may be a feeling of "hospital" light. People may think that the light is too bright if you change the light from warm to cold, even if the light output remains the same.

Getting the right fit for your space is the key to choosing the right color temperature.

When buying lamps, you must inform the seller for what purpose you are buying them. If you are replacing incandescent, halogen or energy saving lamps on LED, it is advisable to replace it in all rooms at the same time, so it will be difficult to notice the differences. Before carrying out such a replacement, we recommend purchasing a sample and testing it in your room, thus assessing not only the color temperature, but also, which no less significantly affects the perception of light.