Outdoor lighting from the past city circuit lamp, to the present solar street lamp has become the trend, not only the way to provide energy is changing, the source of street lamp lighting is also constantly updated, from the past high-pressure sodium lamp is gradually replaced by solar LED street lamp, so specifically, what is the difference between LED light source and high-pressure sodium lamp?
Traditional high-voltage sodium lamps are powered by municipal electricity. This process requires a large number of power equipment. It is difficult to install, and it will also produce more costs. Moreover, using municipal electricity means that electricity bills need to be paid, which is not small expenditure.
The installation of solar LED street lamp is simple, just dig a pit, do not need to lay extra lines, save equipment costs and human costs, and photoelectric conversion through solar energy, later will not generate electricity charges.
2) Environmental protection
The traditional high-pressure sodium lamp is a kind of high-intensity discharge light source using high-pressure sodium vapor discharge. In this process, a 250W high-pressure sodium lamp can produce only 1290 kg of carbon dioxide a year, which is extremely harmful to environmental protection.
As a kind of cold light source, solar LED street lamp will not produce any carbon dioxide or other harmful substances to the environment in the process of illumination. If the traditional high-pressure sodium lamp ring is lined with LED light source, the reduction of carbon dioxide is immeasurable. While protecting the environment, it also saves the reduction of carbon dioxide.
3) Luminescence efficiency
The high-pressure sodium lamp also takes a long time to start, and the normal brightness can only be achieved after 5 to 10 minutes of power-on. And the lamp can not be immediately restarted after extinguishing. It needs cooling for at least 5 minutes. If you want to irradiate the designated area, you also need to reflect through the reflector. The utilization rate of light is only about 40%.
The LED light source can directly convert electricity into light, without the problem of long start-up time. It is easier to control when it is switched on and off. Most of its light can be directly illuminated to the designated area. Compared with sodium lamp, it can save 40%-75% energy, and the utilization rate of light source can reach 90%.
4) Lighting effect
The color temperature of high pressure sodium lamp is between 2000 and 2500K, and the color rendering index is between 20 and 30. This kind of illumination effect is very poor in reducing the object color, which is not conducive to judging the surrounding environment. Moreover, in such an environment for a long time, it is easy to feel dizzy and dangerous.
Solar LED street lamp has a wide range of color rendering temperature and perfect dimming function. It can use neutral light which is close to natural light. The color rendering index is also high. It can better restore the original color of the object, bring better lighting effect, eye comfort is also good, and improve the safety of night traffic.
5) Service life
Another point has to be said is its service life. The average service life of high-pressure sodium lamp is between 3000 and 5000 hours, while the service life of solar LED street lamp is more than 10 times, which can reach 30,000 to 50,000 hours.
In conclusion, compared with high-pressure sodium lamp, solar LED street lamp has obvious advantages, such as better lighting effect, lower cost and longer service life, which can better achieve the development goal of "energy saving, emission reduction and green lighting".