The Research On Influences Of LED And HID Lights For Economizing The Energy Of Road Lighting

With the development of science,technology and urbanization,road lighting plays a vital role for urban planning and construction.As the lighting gradually updates,there are more and more strict requirements.What’s more,energy conservation and environmental protection have been paid more and more attentions.Therefore,energy conservation has been an important research subject when the road lighting meets the demands of the development of urbanization.In the past studies of energy saving in road lighting,researchers mainly concentrate on the equipment in order to meet the requirements of lighting and energy saving,while ignoring reasonable and effective design of the road.According to some studies,the better energy can be realized by making use of reasonable road lighting system and appropriate road lighting standards.This requires us to deeply understand the design theory and standards of road lighting for saving resources.In specific design,we should set rules of the road standard value,power,height,space and the light arrangement to realize reasonable road lighting energy-saving design based on different light sources.This paper focuses on the energy saving of urban road lighting based on LED(light-emitting diode)and HID(high intensity discharge)lights.Firstly,the lighting principles of the commonly used road light sources,LED and HID,are introduced.According to the road lighting classification,standards and energy saving,the reasonable light source,road parameters and light arrangement are determined.Secondly,by measuring the intensity distribution of LED and HID light sources through experiment,we analyze the difference in the actual application and put forward the design program of road lighting system.The research is based on three kinds of light source,including LED lamp,high pressure sodium lamp and ceramic metal halide lamp,and three kinds of road types,two-lane,four-lane and six-lane roads,which are arranged in unilateral,bilateral staggered,bilateral symmetry and centrosymmetric ways.According to the design standard and the energy saving index of road lighting,we simulate the road results,including the contrast degree,the brightness,the arrangement of the lamps and the luminous efficiency,and so on by DIALux software.With systematical comparison to the multiple road scene lighting effects,the best road lighting program is established.Finally,according to the energy saving of road lighting,the LPD values energy saving evaluation index of each scheme are calculated.Moreover,reasonable suggestions for energy saving of road lighting are also put forward.