Analysing Evolution of LED Lighting Design

As the acceleration of urbanization in our country, LED street lights with green and high efficiency, energy saving and long life come into people's field of vision. At present, the LED lighting technology has matured, and high power LED light source effect has achieved 80 lm/W. Energy saving transformation of municipal street lighting is possible.

Different from the traditional street light, LED street light has outstanding characteristics such as cold light source, high brightness, narrow beam output and so on, which makes higher demand of the designers who design new LED lighting products. Producing the LED street lights should firstly consider using the limited luminous flux into effective irradiation range. Therefore, it is very important to effectively control the distribution of light.

Street lighting is a system engineering, so it is necessary to clearly understand the standard and requirement of street lights and make full use of the advantages of controllability and long life.

Semiconductor LED light source has its own characteristics on structure and optical property. Therefore, LED street lights should be designed in accordance with those characteristics. It is very important to the light tube installation, scientific and reasonable optical light distribution, the sealing with light body. At the same time, the structure of the light body designed should be useful to large quantities of industrial production.

LED heat is the key to solve. LED is cold light source, which is not like gas discharge light producing scorching temperature. In view of the limitation of the tube efficacy, LED has its own limited heat heat-resistant ability, so the heat that LED produced in the course of work must be sent out to ensure the LED to work in safe temperature. Then LED lights can really reflect the advantage of long life. It is very important to choose LED of the street light. From the point of view of the technology of the high power LED, it is more reasonable to choose high power 1W LED with higher efficacy and energy saving.

The LED light color selection is also a noticeable element. In the development of street lighting, there is using comparison between yellow and white light. Yellow light mainly refers to high-pressure sodium light. Though that kind of light is economic and energy-saving, it is weak in color rendition ability. The goal of white light is natural sunshine, because it has the best colour performance ability, and the sun is a kind of warm white light. With energy saving and long service life, LED light source and color temperature are suitable for street lighting and a wide range of promotion.