Illumination and brightness say: We are different!

Release date: 2018-05-10 Source: Aladdin Lighting Network Share:

Whether museums, restaurants, hotels, home and so on, these places are inseparable from the lamp light, it can make sense more valuable commodity, so the food more appetite, make home more warm, light can be said is not affected It is only the atmosphere of the space itself, it is the magic weapon that drives people's mood.

Light can be touched all the time in our daily lives, and when it comes to light, it will definitely talk about illumination and brightness. Wait... Maybe someone might ask if these two are not one thing? of course not!

So, what is the difference between brightness and illuminance?

First of all, before understanding the relationship between the two, we need to understand the conceptual difference between "illuminance" and "brightness". The following is a relationship diagram of various light parameters. After reading it, you should know something about it:

Illuminance, in short, is the amount of light (light flux) emitted by a light bulb that is incident on a surface with a certain intensity (light intensity) in a certain direction. At this time, the illuminance of this surface can be measured.

The brightness refers to the physical quantity of the illuminant (reflective body) surface illuminating (reflective) strength, the human eye observes the light source from one direction, and the ratio of the light intensity in this direction to the area of ​​the light source "visible" by the human eye is defined. For the brightness of the light source unit, that is, the luminous intensity per unit of projected area, when we observe the illuminated surface at a certain position, we see the brightness (brightness) of the surface.

We explain it in a simpler and more intuitive way:

• Illuminance is an objective parameter. We use instruments to detect the amount of light actually arriving on a certain surface.

• Brightness refers to the extent to which the light emitted or reflected by an object is perceived by the human eye.

In addition, regardless of whether the surface is black or white, wood or stone, the illumination values ​​are the same. The surface reflects light, possibly specular reflections, and more likely diffuse reflections, reflecting light in many directions in space.

So, what effect does illuminance and brightness have on our lives?

It can be said that all indoor space lighting needs to assess the horizontal illuminance of the working surface, but pay attention to the adaptability of illuminance and color temperature. For example, in our work, it is not enough to change the light color in the office, but also pay attention to illuminance.

â–² Illumination High color and low temperature will make people feel very stuffy, while high illumination and low color will cause gloomy and tired feeling, resulting in reduced work efficiency.

The experiment shows that between 300lx-500lx, the satisfaction of workers will increase significantly with the increase of illumination level; the satisfaction of workers above 500lx will basically reach saturation, and the increase of illumination level will not significantly change the illumination of workers. Environmental evaluation. Therefore, the current domestic office lighting standard is 300lx-500lx, which is also the most suitable illumination for the working surface.

In addition, in the dining space, there must be sufficient illumination in the indoor environment and on the table top to meet the basic needs of customers. According to the China Lighting Association's recommendations for architectural lighting design in China, the table illumination is 200lx.

China's "Architectural Lighting Design Standards" stipulates that: the illumination level of the Chinese restaurant 0.75m should not be lower than 200lx, the western restaurant should not be lower than 100lx, and the illumination values ​​of each space position refer to the following figure:

The ambient lighting in the dining space is the same as other ring mirror lights. It should be designed according to the characteristics of the environment and the atmosphere. However, in general, the illumination of the background lighting, ambient lighting and general lighting should be lower than the illumination on the table. It can be around 100lx, and the illumination on the table needs to reach 200lx-450lx, which forms the lighting of the key area, and creates a friendly and intimate atmosphere together with the local illumination around the seat.

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