Green LED street light PK traditional high pressure sodium street light
BENWEI LED lighting: At present, my country is creating a resource-saving and environment-friendly society, and "green LED street lighting" is deeply rooted in the hearts of the people. Compared with traditional high pressure sodium street lights, what are the advantages of green LED street lights?
Advantages of green LED street lights:
1. Energy saving and environmental protection
Compared with traditional high pressure sodium street lights, LED lights can save 50% to 70% of energy consumption. LED street lights do not contain mercury, lead and other elements, and the whole process of manufacturing, use and scrapping does not produce environmental pollution.
2. Long service life
The service life of traditional high-pressure sodium street lamps is about 3000-5000 hours, and the service life of LED street lamps is more than 30,000 hours (3-5 years), which greatly saves loss and maintenance costs.
3. Wide Start
The voltage of traditional high-voltage sodium street lamps is too low to start normally, and LED street lamps can be started in the range of 90V-260V.
4. Strong material
The traditional high-pressure sodium street light is made of glass, which is fragile and dangerous. The LED street light has no filament, no glass bubble, and is not easy to break.
Compared with green LED street lights, high-pressure sodium street lighting has the following disadvantages:
1. High power consumption and low power efficiency. For example, for a high-pressure sodium street light with a nominal 250W, the overall power consumption is generally around 307W, and the power efficiency is only 66.8%.
2. The color rendering index is low. Ra is usually only about 20-30, the light appears dim, and the color reproduction ability is poor.
3. The brightness controllability is poor. For high-pressure sodium street lamps, a dedicated booster power supply can supply power to the lamp to light up, and its brightness cannot change rapidly in a transient state.
4. Short life and high maintenance cost.
5. The light distribution is poor, and the water drop-shaped light spot effect makes a lot of useless light transmit to places far away from the road. The ideal spot effect should be a rectangular spot, illuminating the road and a certain range on both sides (ie, the batwing light distribution curve).
The power is large, and the wiring cost is extremely high. Due to the large power consumption, the diameter of the power copper wire used is relatively thick, while the LED street lamp can use relatively thin copper wire to meet the same needs.
