What are the correct points for the selection of interior lighting?

1. Meet functional requirements

The functional requirements of the local space are the first considerations, such as the basic lighting of the home area, the illumination requirements of the reading area, the illumination of the cooking area and the dining area, the color rendering index requirements, the illumination and color development of the clothing storage area. Index demand, etc., the lighting must be prepared before the scene is expected.

2. Meet the comfort needs

For non-functional area lighting, it is necessary to avoid the glare effect and reduce the light pollution caused by unnecessary light sources. A low color temperature source with indirect illumination provides soft light and helps to relax.

3. A reasonable match with the materials used in interior decoration

Wall paint wallpaper, door sleeves, floor tiles, wall paintings, colorblock rugs, high-saturation pillow cushions, dolls and souvenirs on the shelves, these items and materials that form the local visual center of gravity, the color temperature of the light source The requirements for color reproduction, the concentrating ability of the luminaire, and the size of the spot are not the same. Different light sources and luminaires are selected, and the color effects are almost completely different.

4. Light and shadow segmentation

The shape selection of the luminaire will affect the illumination range of the light source. Different installation angles and directions have different energization effects, which affects the distribution of light and shadow areas projected on the top surface of the wall. Interested friends can study the light distribution curve slightly. .

5. Other suggestions

When purchasing the lamp light source, pay attention to the type of interface and the required size for installation, and the light source of the same illumination layer should be consistent in color temperature and color rendering.

In the following, we will discuss the color selection of indoor lighting more specifically. Considering the questioner's expression, let's discuss the color temperature problem first.

In the selection of lighting in interior design, according to the needs of functional lighting, consider the possibility of comfort lighting, do a good job of designing the lighting level, and select the color temperature, luminous flux, color rendering with reference to the preset orientation of the visual center of gravity. Light source and matching lamps with appropriate index, power and shape.

The above figure points out the relationship between the lumens of the light source, the illumination test value of a working plane, and the visual brightness. It is easy to understand some basic concepts. The above figure points out the relationship between the lumens of the light source, the illumination test value of a working plane, and the visual brightness. It is easy to understand some basic concepts.

As shown above, this is a schematic diagram of the daylight color temperature at different times of the day in the same location.

In addition to the opposite relationship between the two figures, the above two figures can make a basic understanding of different color temperature effects by making a comparison.

The above figure shows the display effect of the medium and low color temperature light source after reflection, and the section division is more detailed. The above figure shows the display effect of the medium and low color temperature light source after reflection, and the section division is more detailed.

In the application of color temperature knowledge, it can also be flexible. For example, when the effect of natural lighting is not considered, the effect of pure white latex paint wall with low color temperature light source and the effect of light yellow latex paint wall heightening color temperature light source can be adjusted. To the approximation, this also provides a reference for some residents who do not intend to make a big move and only want to do some partial transformation.

Next is the color rendering index. In theory, the color rendering of the light source needs to look at the color rendering index (Ra) first, but because the spectral distribution of different light sources is different, in general, where the color elements are rich, such as fine art. Pavilions, supermarkets, and mixed-use residential spaces need to use artificial light sources with relatively continuous spectrum and wide frequency bands to restore more realistic color.

On the spectrogram, we can see that the spectrum of the incandescent lamp is more right-handed and more continuous, and the LED spectrum, whether it is cool white or warm white, is much more continuous than the spectrum of the fluorescent lamp, and the frequency band is wider. On the other hand, it can also be seen from the figure that the LED light source is more biased toward the blue region, and the incandescent lamp is more reddish, which is also in line with the common sense that the incandescent light is yellowish and the LED light is blueish and blue.

Where it is necessary to truly reflect the original attributes or surface texture of the item or material, a higher color rendering index is required, such as the position of the dressing of the entrance, the storage and dressing position of the closet, the position of the wall painting, the position of the table of the coffee table, and the setting of the table. Disk position, etc.

After talking about a few basic concepts, there are several issues worth discussing, such as the layered design of lighting. This concept includes the difference between full-area lighting and local lighting. The difference between functional lighting and ambient lighting, fixed lighting and temporary The difference between sexual lighting and so on. For example, the medium and low color temperature, medium and low illuminance, medium and high color rendering light source for auxiliary lighting of decorative objects and narrow spaces, with color temperature of about 3800K-5300k, medium and low color rendering (Ra can be less than 80, of course, there are conditions In the case of a high-Ra light source, a light source with a single-point illumination of more than 300 lx can be used for main illumination to form an illumination level. Higher color rendering, smaller illumination range, and slightly lower illumination intensity are more suitable for decorative objects with lighter colors, and it is not easy to grab the visual center of a certain wall.

In addition to layered lighting, there are several mentioned above, the echo and coordination of indoor materials and light source lamps, the influence of lighting appliances on the overall layout of the interior design and the setting of the visual center of gravity, reducing glare and avoiding indoor light pollution.

In the use of indoor light, reflection and feedback should also be considered. It should include both specular and diffuse reflections. Light-colored all-ceramic tiles, glass partitions, glass countertops and other bright surfaces can be considered as specular reflection materials. Latex paint wall (including top surface), wallpaper wall surface, sofa leather surface, sofa fabric surface, and most other indoor material surfaces can be considered as diffuse reflective surfaces, and reasonable use of diffuse reflective surfaces, using indirect lighting The way to reduce the effects of glare, as much as possible to avoid indoor light pollution.

There are also some other indoor materials, including floor, tile, stone, interior door, door cover, baseboard, balcony partition, etc. In the lighting design, according to the material characteristics of the above items, the color rendering of the light source, Coordination between elements such as color temperature and material surface reflection characteristics.

For example, the interior door and door cover, the surface material of the white sticker and the surface material of the white paint are different under the same color temperature and color rendering, white and light yellow wood color, light yellow wood color and walnut color, yellow There are similar differences between the log color and the dark red paint.

By the same token, the angle and direction of the light emitted by the luminaire and the household appliances (mainly the refrigerator, which may block direct light) and the location of the main furniture also need to be predicted and coordinated, and the color temperature and illuminance of the light source are predicted in advance. Purchase the projection effect on the surface of the furniture. The style and surface material of some electrical appliances also need to be taken into account. For example, the refrigerator may be placed in the dining area. The door may have a white glossy surface, a gray metal brushed surface, and a champagne-colored glossy surface, even when illuminated by the same light source. Underneath, it will also have different effects.

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