Artificial lighting plays an important role in supermarkets because of the lack of natural light in supermarkets. Good supermarket lighting should first enable customers to have basic visual ability and certain square guidance in large open spaces; secondly, good and purposeful display of goods and provide necessary information; finally, lighting operating costs in supermarkets The proportion of the medium is high, so the energy efficiency of the lighting system design is as important as the lighting function and lighting quality.
Lighting lighting case picture
Supermarket shelf lighting usually also plays the role of basic lighting. The main task of basic lighting is to provide sufficient and uniform illumination level for the shopping area. The well-designed basic lighting system can create a pleasant and comfortable whole supermarket. The environment, from the physical to the psychological, to meet the needs of customers happy shopping.
So, how should the shelf lighting be arranged? Let's take a look at the lighting conditions of Decathlon:
Lighting strip on the ground floor shelf
Illumination strip for the main channel of the basement
A layer of light, a variety of fields, and double-tube, energy can be imagined
Is this kind of lighting method right? Is there any problem?
The illuminance was tested with the mobile phone software. The illumination below the lamp strip was around 800lx, and the illumination in the middle of the two rows of lights was around 650lx. The uniformity was OK. However, on the shelves displaying goods, the vertical illumination is only about 200lx.
Is this illuminance distribution beneficial for merchandise display and information transfer?
1, the way of lighting
We can see that the shelf lighting strip on the basement of Decathlon is the one below, that is, the strip is perpendicular to the shelf:
First of all, this arrangement does not have the most effective use of the lighting system, and some unnecessary areas deplete the economics of lighting: for example, the lighting at the top of the shelf is an uneconomical way of lighting.
Secondly, this kind of lighting method can not provide sufficient uniform vertical illumination for the shelves displaying goods, affecting the display of goods and the transmission of visual information, thus affecting the shopping experience and sales.
The correct way: arrange the light strip in the middle of the two rows of shelves, so as to ensure the basic lighting of the channel, while ensuring the vertical illumination level of the shelves on both sides, to avoid the uneconomical caused by the waste of light.
The comparison is as follows:
Wrong way
Right way
2, the choice of light distribution
The lamp strip used by Decathlon is a T8 bracket with a double-sided herringbone cover, in which the underground layer is a concave aluminum reflector (commonly used for outdoor floodlights), and the first layer has a mirrored aluminum reflector (poor quality, light source) The ghosting and rainbow effects are obvious), and there are also white steel plate reflectors. You can imagine the approximate light distribution shape.
If you still don't understand, we can also get a general understanding of the light distribution of this light strip through the wall spot:
The main light distribution is narrow, and the light intensity is weaker than 30°.
Axial elliptical light intensity
With this kind of light distribution, we can understand why the vertical illumination level of the shelf is so low.
Then, what kind of light distribution curve lamps are most suitable when lighting the lights along the center of the shelf? For the fluorescent light strip, the answer is: Batwing (I don't understand the first picture below, Teacher Xu Qinghui will have a special article to tell everyone that the light distribution curve is a thing, haha).
For the LED, the imagination space is very large, making full use of the small size of the LED and the characteristics of the lens. It is not difficult to provide an LED light strip product that takes into consideration the basic lighting of the aisle and the vertical illumination of the shelf. Unfortunately, our manufacturers still stay in the replacement of the lamp. LED products. . .
Batwing light strip with vertical shelf lighting
Batwing light with a pseudo-color effect in the calculation
Pseudo-color corresponding illuminance value
In fact, Decathlon's lighting design is aware of this. It uses a double-tube T8 fluorescent wall washer on the lighting of the wall shelf, and the vertical illumination of the shelf reaches nearly 400lx. The mirror aluminum reflector material of this luminaire generally has a rainbow effect, and the efficiency of the luminaire should not be high. The meaning of the light distribution is very rough, but it is rather regrettable.
Double tube T8 fluorescent wall washer light strip
Wall washer light distribution (wall spot), it looks like the height of the lamp is very high, it is actually the mirror image caused by the specular reflector
Of course, the lighting of the shelf is not just a light band, as long as it meets the basic needs of the shelf display (see the line of sight analysis below), it can be achieved in different ways.
Shelf display line of sight analysis
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