Overview
Modern offices are work environments composed of various visual tasks, which not only need to meet the basic requirements for reading and writing but also create a pleasant and comfortable working atmosphere, ensuring the physical and mental health of the staff, stimulating their enthusiasm for work, and thus improving work efficiency.
High-quality office lighting design can effectively improve work efficiency. The factors that determine the quality level of office lighting include: illuminance, uniformity, glare, brightness distribution, color temperature, and color rendering index. At the same time, it is necessary to comprehensively consider overall intelligent control, safety, energy saving, etc., to create a comfortable, harmonious, and efficient working environment.
1. Elements to Consider in Business Office Lighting Design
The following major factors must be considered:
Color temperature selection: The color temperature of general office lighting sources is suitable between 3300—5300K.
Color rendering index: The general color rendering index for office lighting sources is selected in the range of 60—80, while also considering initial investment, installation, maintenance, and energy-saving factors.
Brightness ratio parameter table.
| Between surface types | Brightness ratio |
| Between the work surface and nearby objects | 1:1/3 |
| Between the work surface and distant dark surfaces | 1:1/10 |
| Between the work surface and distant bright surfaces | 1:10 |
| Partition (divider) | 40%-70% |
| Floor | 20%-40% |
Reflection ratio parameter table
| Type/Area | Reflection ratio |
| Ceiling | Above 80% |
| Walls | 40%-70% |
| Furniture | 25%-45% |
| Office machines and equipment | 25%-45% |
| Floor | 20%-40% |
Importance of glare control comparison reference table
| Project/Type | Independent office | Comprehensive office | Corridor |
| Direct and indirect glare control | Very important | Very important | Sometimes important |
| Lighting for walls and ceilings | Very important | Very important | Important |
| Physical relationship between fixtures and users | Very important | Very important | Sometimes important |
| Uniformity/reducing shadows and flicker | Important | Important | Sometimes important |
| Color rendering and color temperature | Important | Important | Important |
| Natural light | Important | Important | Sometimes important |
| Lighting control | Important | Important | Sometimes important |
Illuminance parameter table for various functional areas
| Area type/Location | Reference plane and its height | Standard illuminance value (Lx) | UGR | Ra |
| Reception/Reception room | 0.75 horizontal plane | 300 | / | 80 |
| General office (comprehensive) | 0.75 horizontal plane | 300 | 19 | 80 |
| High-end office, design room | Actual work surface | 500 | 19 | 80 |
| Commercial office (business hall) | Actual work surface | 300 | 22 | 80 |
| Conference room | 0.75 horizontal plane | 300 | 19 | 80 |
| Document sorting and issuing room | 0.75 horizontal plane | 300 | / | 90 |
| Data and archive room | 0.75 horizontal plane | 200 | / | 80 |
2. Key Functional Area Lighting Design Guidelines
Reception area lighting design
The reception area is where the company presents a good image. In addition to the decoration design of the reception area, the demeanor of the staff, and the arrangement of decorations, the lighting in the overall space should emphasize the distribution of light and dark and the order of the space, providing a comfortable and gentle first impression. Especially for the company's logo lighting, it should be clear and bright, leaving a deep impression on visiting clients and other personnel.
Comprehensive office lighting design
A comprehensive office generally refers to an office space of over 80 square meters, divided into multiple separate workspaces, where multiple departments work together in a large space. Its lighting design generally provides uniform lighting, but also distinguishes between general lighting and local lighting, each contributing 50% to the illuminance required for work. Attention should also be paid to controlling glare and brightness ratios. Different design methods should be used for different layouts and the distance and density of partitioned spaces.
Independent office lighting design
Independent offices are often places where middle and senior management personnel work, generally characterized by privacy and enclosure, while also serving the function of receiving guests and important business negotiations.
In lighting design, a combination of general and local lighting is required, such as ensuring that the illuminance for the office area (desk) reaches above 500LX to provide sufficient illuminance for normal office needs. For small discussion areas, local lighting methods can be used, such as placing table lamps or floor lamps next to sofas, or designing small spotlights or wall lamps on the walls to meet the required lighting effects, while also paying attention to the transition between office and discussion lighting.
Conference room lighting design
The conference room is a medium to large office area that integrates discussion, training, and group activities, requiring various flexible and intelligently controlled lighting effects to facilitate various types of collective work.
The lighting design for this area requires a combination of general and local lighting. In addition to providing sufficient illuminance to ensure that participants can write and work, local lighting control is used in the podium area to highlight it, reflecting the guiding and emphasis effect of the lighting in the podium area, facilitating special lighting needs for projection, handwritten whiteboards, speeches, etc.
General Mode
Focus on reflecting a sense of compactness for the participants, creating a better discussion atmosphere, generally using a method where the illuminance in the center is higher than that of the surrounding area (or turning off the surrounding lights to highlight it). The overall color temperature is controlled at 3000K, with an average illuminance of over 400LX.
Projection Mode
During the slideshow and to ensure that the content and patterns on the projection are clearly visible, consideration must also be given to the participants' note-taking work. Therefore, the surrounding illuminance should be set at around 150LX. At the same time, considering the relationship between the participants and the projection distance, as well as the overall energy-saving effect, the illuminance is designed in a stepped manner, gradually increasing from the front row to the back.
Speech Mode
The principle is to highlight the speaker's image without affecting the speaker's feeling, with the podium illuminance controlled at 90%-100%, while the audience area and other positions should be adjusted down to 50%-60%, with the basic illuminance controlled at around 200LX.
Reception Room Lighting Design
The reception room is a place specifically set up by the company to receive external guests, and it is also an important venue to reflect the company's internal culture. In lighting design, different lighting techniques should be used based on the company's culture, decoration style, and indoor layout. However, one common point is to create a comfortable and relaxing spatial environment.
Tea Room Lighting Design
The tea room is a place specifically set up by the company for employees to take a short break and relax during working hours, and it also reflects the company's culture and a form of welfare. However, the role of this area is very significant. Therefore, in lighting design, it is necessary to consider the company's culture and connotation, focusing on creating a warm, comfortable, and relaxing spatial environment.
Design Plan for LED Lighting in Commercial Office Buildings
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