Compared with traditional lighting lamps, LED lamps do not need to use filters or filters to produce colored light, which not only has high efficiency and pure light color, but also can achieve dynamic or gradual color change. At the same time of changing the color temperature, it can keep a high color rendering index to meet different application needs. However, new requirements are put forward for its packaging, which are embodied in:
（1） Modularity
Through the connection of multiple LED lights (or modules), good superimposition of lumen output can be achieved to meet the requirements of high brightness lighting. Through modular technology, multiple point light sources or LED modules can be combined according to arbitrary shape to meet the lighting requirements of different fields.
（2） System efficiency maximization
In order to improve the light output efficiency of LED lamps, in addition to the need for appropriate LED power supply, we must also adopt efficient heat dissipation structure and technology, and optimize the internal / external optical design to improve the efficiency of the whole system.
（3） Low cost
In order to go to the market, LED lamps must have a competitive advantage in cost (mainly refers to the initial installation cost), and packaging accounts for a large part of the production cost of LED lamps. Therefore, the key to achieve LED lamps commercialization is to adopt new packaging structure and technology to improve the light efficiency / cost ratio.
（4） Easy to replace and maintain
Due to the long life and low maintenance cost of LED light source, higher requirements are put forward for the packaging reliability of LED lamps. It is required that the design of LED lamps should be easy to improve to meet the requirements of higher efficiency LED chip packaging in the future, and that the interchangeability of LED chips should be good, so that the lamp manufacturers can choose which chip to use.
LED lamp light source can be composed of multiple distributed point light sources. Due to the small chip size, the light weight and delicate structure of the packaged lamp can meet the requirements of various shapes and different integration degrees. The only disadvantage is that there is no ready-made design standard, but at the same time, it provides enough imagination space for design. In addition, the primary goal of LED lighting control is power supply. Because the general power supply is high-voltage alternating current (220V, AC), and led needs constant current or current limiting power supply, it is necessary to use conversion circuit or embedded control circuit (ASICs) to achieve advanced calibration and closed-loop feedback control system. In addition, through digital lighting control technology, the use and control of solid-state light source mainly rely on intelligent control and management software, so as to establish a new relationship between users, information and light source, and can give full play to the imagination of designers and consumers.
