Solar powered street lights are a very good example on what can be done with solar energy. Solar street lights present the perfect and cost-effective solution for residential streets, parking lots, security, roadways, parking lots and other general area lighting applications.
Solar street lights can be economically viable and efficient in a number of applications, mostly in areas where the cost of providing electricity is expensive or problematic.

A Standard Solar Lighting System includes: 
1.    Solar Panel
2.    Solar Battery
3.    Solar Controller Regulator
4.    Lighting Sources
5.    Fixture
6.    Fitting and Mounting 
7.    Cables etc.
 

Solar Panel
Its task is to convert the sun`s energy into electricity. Different sizes and power outputs are available. Solar panels should be able to withhold and deliver in extreme weather conditions. Some are even designed unbreakable (vandal proof); others will work well in overcast weather. A 20 Year Warranty on good solar panels is not unusual.

Solar Controller
the basic circuitry on most solar powered street lights consists essentially of an automatic battery charger fed by the solar panel and a lighting controller automated for dusk to dawn operation. Automatic lighting can be triggered by a photocell or a timer. 

Battery
Maintenance-free batteries are generally used on solar street lights. In addition to providing energy for dusk to dawn operation, they must also be able to supply few days of backup power in case of bad weather or charger failure.

Lamps
The choice of lamps to use in solar powered street lights is dictated by the kind of application you`re after: 
nbsp;   LEDs (Light Emitting Diodes) also known as SSL (solid-state lighting) have a good color rendition. A cluster of extra or ultra bright LEDs forms the lamp. LEDs consume a fraction of the energy of comparable lighting and have a very long life span. Solar LED street lights are an emerging and promising application for LED technology.�?/P>

CF (Compact Fluorescent) lamps produce a white light and are used in places where color rendering is desired.

HID (High Intensity Discharge) lamps, mainly LPS and MH:

1.    LPS (Low Pressure Sodium) lamps generate a monochromatic yellow-orange light and are used when color rendering is not an issue. They have a lifespan of up to 18,000 hours
2.    MH (Metal Halide) lamps produce a clean white light and are perfect for applications where color rendering is essential

Benefits of Solar Street Lights
1. Energy saving Provide electric energy with solar energy photovoltaic conversion, that would never be exhausted;

2. Environment protection No pollution, no noise, no radiation;

3. Safety No such accident as electric shock or fire at all;

4. Convenience Simple installation, no need to erect wire or excavate ground without consideration of power shut down or power restriction;

5. Long life High technical content of the product, control system and module being of famous world brand, intelligent design, reliable quality;

6. High quality Technical product, green energy, using units attaching importance to technology, enhancing green image and level;

7. Less investment-Investment all at once, same price as AC power (sum of AC power investment from substation, power feeding, control cabinet, cable and engineering), investment all at once with long term usage;

8. Wide application solar energy comes from nature. It can be used so long there is sunshine, especially suitable for green land sight light equipage, high grade housing and outdoor lighting, tour scenic spot and coast lighting and decoration, industrial development area, factory and enterprise street lamp, outdoor light of colleges.