How to Choose Light Source for Solar Street Lamp?

Solar street lamp is widely used for outdoor lighting. It can be installed in any places with abundant sun light. They are powered by solar panels installed on the lighting system or integrated in the street lamp pole, reducing the need for electricity. By using the renewable solar energy, the solar street lamp saves a lot of cost which are extremely cost effective. Solar street lamp is composed of controller, solar panel, battery, lighting fixtures. Various lighting fixtures can be used in solar street lamp. During the development of solar powered street lamp, the advanced technology has promoted the development of street lighting fixture. LED has been the most popular lighting fixture. High pressure sodium lamps, LED lamps or electrodeless lamps can all be used.

High pressure sodium lamp

The high-pressure sodium lamp emits golden white light when in use. It has the advantages of high luminous efficiency, low power consumption, long life, strong fog penetration and non-corrosion. However, the color temperature of the high-pressure sodium lamp is 2000K-2100K, the light emitted is yellow and the display index is relatively poor, so it is not suitable for outdoor road lighting, but it is still widely used indoors and stadiums.

LED lighting fixture

LED street lights have the characteristics of directional light emission, low power consumption, fast driving speed, high shock resistance and long service life. They are a new generation of energy-saving light sources. The LED light source has the characteristic of directional light emission, without the diffuse reflection of the high-pressure sodium lamp, reducing a lot of light pollution. With the continuous depletion of petroleum energy and the deteriorating environment, the call for energy saving of street lamps is getting higher and higher. Solar street lamps have emerged. Solar power generation is direct current and the voltage is relatively low. It is difficult to drive high-pressure sodium lamps. The LED light source is a light-emitting diode and does not need high-voltage breakdown drive, so solar street lights use LED light sources.

LED as a point light source, if the design is reasonable, it can directly solve the secondary light extraction and light loss problems that traditional spherical light sources must rely on light emission to solve; second, the uniformity of the light irradiation surface is controllable, theoretically it can be completely uniform in the target lighting area, which can also avoid the light waste in the phenomenon of "lighting under the lamp" in traditional light sources. It is a cost effective choice for solar street lamp.