1. Light attenuation of lamps
  The light attenuation of lamps refers to the negative effect of the optical system and lamp structure on the luminous flux of the light source, and the phenomenon that the pollution of the optical system caused by the dust and particles in the external environment prematurely weakens. In the design process of lamps and lanterns, the selection, shape, volume and sealing method of the reflector must take into account the problem of light attenuation.

2. Light source protection
In the design of lamps and lanterns, it is necessary to ensure that the light source has a reliable electrical connection, the contact resistance is small, and it will not loosen after vibration.

  In order to protect the light source and extend the life of the light source, the internal structure of the lamp must be scientific and reasonable. In order to enhance the heat dissipation capacity of the lamp, the shape and size of the reflector should be manufactured reasonably, the volume of the lamp can be expanded appropriately, the heat dissipation area can be increased, and the light source can be operated at a suitable temperature to ensure stable performance, safety and reliability.

3. Thermal radiation problems and thermal energy utilization
  In addition to reflecting visible light, the light source also generates a lot of heat radiation. The heat radiation can make the temperature of the lamp body too high, affect the service life of the light source, and cause the material of the lamp to age prematurely. More dangerous is that it may cause leakage, fire, etc. When designing lamps, heat-resistant materials and low-emission light sources should be selected as much as possible. When conditions do not allow, materials with poor thermal conductivity such as asbestos should be selected to isolate the light source from the materials and components of luminaires with poor heat resistance. Using heat dissipation methods, such as heat sinks and reflectors, to refract heat radiation, you can also rely on fans and other forced air circulation to dissipate heat as soon as possible.
When the indoor lighting load is as high as 20-40W / m2, the use of heat energy becomes very important. At present, there have been studies on air conditioning lamps and lanterns, the purpose is to effectively use the large amount of heat radiation generated by the light source.

4. Lamp design should combine function and beauty
  An important part of the design of lighting fixtures is to select the appropriate lamps and lanterns according to the functional requirements and environmental conditions, and to harmonize the lighting functions and decorative effects. Lamps are functional products, but also a rich information carrier and cultural form, which is a comprehensive reflection of people's aesthetic appeal, technological level, and functional needs in the corresponding historical period. Lamp design should take into account at the same time in terms of function, material selection, shape, color, process . The lighting design should also consider the overall relationship between the lighting and the related space environment. Not only the lighting, but also the aesthetics of the lighting can not be separated from the environment, and can be integrated with the environment.

5. Integrated design of lamps
  In recent years, new design concepts and design methods have emerged continuously. The interface shapes of furniture, furnishings, lamps and even spaces are no longer independent decorative elements, but are often combined in various ways, that is, they are used. The decorative effect has expanded the indoor space.