Energy-saving problems in interior lighting design of living space

Climate warming has become a problem that cannot be ignored. All kinds of climatic phenomena happen around us all the time. The UN Intergovernmental Panel on Climate Change reported that the main cause of climate warming is human activity. Energy conservation has become the norm for our behavior. However, blindly demanding energy conservation but neglecting environmental protection and humanization will make energy conservation aborted. The concept of green lighting is the embodiment of this principle. The so-called green lighting is to save energy and achieve the role of protecting the environment. Therefore, in the architectural lighting design, it is necessary to implement the green lighting in accordance with the corresponding national laws and regulations. The following analysis will be conducted on the methods in lighting energy-saving design:

First, architectural lighting design standards

The lighting energy-saving design is designed to save energy for the light source and its equipment that produce visual conditions, so as to achieve environmental protection and humanization. How to achieve energy-saving purposes, there are clear provisions in the "Lighting Energy Efficiency Evaluation" section of the national standard "Architectural Lighting Design Standards" GB50034-2004. It writes: The lighting power density value is used as the evaluation index of lighting energy saving (LPD). This index refers to the lighting installation power per unit area (including light source, ballast or transformer), and the unit is W/m2. This LPD value provides a reference value in our design. We can distribute the light source according to the lighting power density value according to the lighting requirements of the site. Therefore, in order to make rational use of energy, it is necessary to fully understand the site. Adjust the illumination intensity according to the actual situation. For example, the lighting design of a residential Chinese restaurant. The function of the general restaurant is to cater for family members to dine and communicate. Therefore, the lighting design needs to consider these two functions to design the lighting scheme, and then use the LPD value as a reference to properly arrange the distance and intensity between the lighting devices.

Second, make full use of natural lighting to achieve energy saving effect

The use of sunlight to achieve illumination is undoubtedly the most energy-efficient, and the color temperature threshold contained in sunlight is far more than any artificial light. This feature allows the illuminated object to exhibit a richer surface color and texture. In addition, the sun emits a variety of rays such as ultraviolet rays, which can effectively kill germs, so the use value of sunlight can be described as priceless. How to use sunlight in indoor lighting design to achieve energy saving and environmental protection?

1. First of all, the lighting ratio of the room or the area ratio of the lighting window should conform to the "Building Lighting Design Standard", and make full use of the reflection of the indoor light-receiving surface, which can effectively improve the light utilization rate, such as the reflection coefficient of the white wall surface. Up to 70-80%, can play a role in energy saving.

2. It is also advisable to make full use of natural light in electrical control. When the light is strong, some of the lamps near the window can be turned off.

Third, use energy-saving lamps and ballasts as required

Efficient luminaires with efficient light sources save energy. A high-efficiency light source refers to the optical performance K, which represents the luminous flux emitted by the light source per unit of electrical energy consumed. That is to say, on the basis of constant unit power, the greater the optical performance, the more power is saved. Compare the following table:

Comparing the above table, we found that the light efficiency of the incandescent lamp is 15.5LM/W, while the light efficiency of the fluorescent lamp is 69LM/W. It can be seen that the fluorescent lamp is more energy-efficient than the incandescent lamp to some extent.

In addition to the choice of luminaires to help us save energy, the right ballast options can do the same. Ballasts for gas discharge lamps are divided into two main categories: electronic ballasts and magnetic ballasts. The electronic ballast enables the lamp to improve the light visual effect of the lamp and reduce the loss of the ballast under high frequency conditions, which is conducive to energy saving, stable illumination, eliminates stroboscopic and noise, and helps to improve lamp life. . In operation, the total power of the fluorescent lamp can be reduced by 20%. The T5 thin-diameter fluorescent lamp with electronic ballast replaces the original T12 thick-tube fluorescent lamp with ordinary inductive ballast. It can be used for 8 hours per day and can save 23 degrees per year (excluding weekends). The energy saving effect is very impressive. . At the same time, the inductive ballast should also be energy-efficient, so that the total input power of the luminaire can be reduced by 20% again.

Fourth, choose a reasonable lighting control method

There are two main sources of light in the room, one is natural daylighting and the other is artificial light provided by the power supply system. Properly deploying and controlling these two light source classes can effectively reduce energy consumption. Here are a few principles that can be used to control.

1. In the case of better natural lighting, if there is no special need, use natural lighting as much as possible. 2. In the aisle, stairwell, etc., where the nighttime interval needs lighting, install a self-extinguishing switch such as sound and light control. Two or more light source controlled switches should not be larger than two. 4. Install a controllable light intensity control switch on the switch, so that the light source intensity adjustment reduces the power usage.


This paper summarizes the energy-saving and environmental protection measures and methods of indoor lighting design, in order to create a comfortable and healthy environment lighting program to improve people's production, work and study, and quality of life and efficiency. Research in this area will lead us to better establish a harmonious relationship with nature, reducing waste of resources and environmental damage.


[1] "Electrical Design Code for Civil Buildings" JGT16-2008
[2] "Design Specification for Power Supply and Distribution System" GB50052-1995
[3] "Architectural Lighting Design Standards" GB50034-2004
[4] "Code for Fire Protection of Building Design" GB50016-2006

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