Are LED street lights the same as traditional street lights?

I believe that a considerable number of people will not be able to distinguish the brightness of LED street lamps and sodium lamps. Even in many media reports, sodium lamps have been conflated as LED street lamps.


Nowadays, solar street lights use LED light sources, while traditional street lights generally use high pressure sodium lamps and low pressure sodium lamps. Let's compare the night lighting effects of high pressure sodium lamps and LED street lamps.


The high-pressure sodium lamp is yellow light with poor color rendering, while the LED lamp is white light with good color rendering. The lighting characteristics of the two are obviously different. The color of the high-pressure sodium lamp is yellow, and the color temperature and imaging are relatively low. The imaging index of the sunlight is about 10%, and the imaging index of the high-pressure sodium lamp is only about. The color temperature of the LED light source lighting can be flexibly selected between, and the display index can be as high as above, and the light-emitting color of the LED lamp is closer to natural light.


　The utilization rate of the high-pressure sodium lamp light source is only about %, and the light-emitting angle of the lamp tube is °, and most of it must be reflected by the reflector to reach the designated area. The utilization rate of the light source of the LED street lamp is high, about %. The light-emitting angle of the LED diode can be the same as the light-emitting angle of the lamp. Therefore, most of the light of the LED lamp can be directly irradiated to the designated area, and only a small part of it needs to be reflected.


　The high-pressure sodium lamp bulb has a long activation time, and the normal brightness can only be reached after about a minute after the power is turned on. The time interval for restarting is generally greater than minutes. LED street light lamps do not have the problem of start-up delay, and can be switched on at any time and work at any time, which can realize energy-saving control very conveniently.


　Because of the large temperature difference between when the lamp is on and when the lamp is off, if the lamp body does not have a breathing system, the reflector is likely to be corroded by harmful gases and cause greater light loss. LED street lamps do not need to be equipped with a breathing system.


In fact, the same as outdoor lighting, solar street lights are often more popular than traditional street lights. In addition to energy saving and environmental protection, the installation of solar street lights has more economic and social value. The social environment of equipment automation will increasingly drive the development of solar street lights.