LED street lights manufacturers have turned solar street lights into real products that can be seen on the road. Solar Lamps make sense for many reasons, such as their compact size, greater efficacy (lumens per watt), durability, and robustness. LED sources have given the flexibility for interesting new designs with slimmer profiles as compared to traditional metal halide arc lamps.
Solar Street lights systems are designed in a manner to enhance the safety for pedestrians and for vehicles both. Visibilities of obstacles on the road surface and in potentially dangerous situations where roads are crossed by other vehicles or pedestrian crossings is guaranteed and are in accordance with technical standards and laws.
Pole-mounted solar lamps are the traditional technical solution for solar street lights. This give the advantage of using the best lamps in terms of tone and color rendering, as well as maximum light efficiency, resulting in big saving in energy consumption.
Application of LED by the LED street lights manufacturers in solar street lights is a response to the need to improve the light quality and save energy. Best LEDs are selected from the top performing ones in terms of efficiency, durability, energy saving potion, color enhancements and brightness. The distribution of the light depends upon the type of traffic and features of the road. The optics used for street lighting luminaries distribute the light based upon the number of lanes and their sizes, whether it is motorway, major roads, city roads or narrow roads and several other factors.
How Street Lighting Calculations Are Performed:
It is assumed that the solar lamps are far away from the surface of the road that they illuminate. To calculate the test metrics for them, their intensity distributions, positions, and orientations are the data which are required. Summed ill luminance at any point on the road for all the installed lamps are calculated by the LED street light manufacturers on the basis of the intensity distribution. The luminance calculations are performed based on the factors such as the angle of light coming from the lamp and striking the roadway as well as the angle of the standard observer. Then, a table of reflectance’s for those angular coordinates, called the R Table, and is interpolated to find the correct reflectance of the roadway and the luminance observed.
Next step is to design the solar street lights geometrically. But before we can design the lamp geometry, we need to define a source model. There are many suitable, high-brightness LEDs on the market, some of which are specifically sold for street lighting applications. In addition to the specifications sheet, the manufacturer provides a CAD model of the LED exterior, as well as ray files, the intensity distribution, and other pertinent information.