led street light PK traditional high pressure sodium lamp

LED street lights have gradually entered people's field of vision with the advantages of directional light emission, low power consumption, good driving characteristics, fast response speed, high shock resistance, long service life, and green environmental protection, and have become the most advantageous alternative to traditional light sources in the world. A new generation of energy-saving light sources, therefore, LED street lights will become the best choice for energy-saving transformation of road lighting. LED street lights are semiconductor lighting lights, which use light-emitting diodes as light sources. Because they are solid-state cold light sources, they are environmentally friendly and have no pollution, low power consumption, high light efficiency, and long life.

The difference between LED street lights and conventional high-pressure sodium street lights is that the light source of high-power LED street lights adopts low-voltage DC power supply and high-efficiency white light diodes synthesized from GaN-based power blue LED yellow phosphors. It is highly efficient, safe, energy-saving, and environmentally friendly. Long life, fast response speed, high color rendering index and other unique advantages, can be widely used in urban road lighting. The outer cover can be made of PC tube, which is resistant to high temperature and low temperature.

The comparison between them:

.Light utilization, luminous rate

The LED street light source has the least luminous flux loss. Unlike traditional light sources, LED lights are half-space light sources. The high-pressure sodium lamp is a light source that emits light in a whole space. It needs to change the direction of the emitted light from one half of the space to reflect the reflector in the other half of the space. At the same time, it will inevitably absorb light and block the light source itself. When using LED lamps as light sources, there will be no loss in this respect, and the light utilization ratio is higher than that of high-pressure sodium lamps. At present, LED lights are at-lumens/watt, while high-pressure sodium lamps can reach lumens/watt. The spectrum of the high-pressure sodium lamp is more concentrated in yellow, and the color temperature -K is strong in fog penetration. The sodium lamp has a very big problem that the lighting continuity of the sodium lamp is very poor. In the working state of the sodium lamp, the temperature in the lamp cavity must exceed °C, while the temperature of the LED lamp is% of the high-pressure sodium lamp. In the non-working state, the negative pressure sucks in a lot of dust and insects, which greatly affects the light output effect of the sodium lamp. life. The LED is relatively stable.

.Comparison of energy saving and environmental protection

LED lights are highly energy-efficient and ultra-low power consumption. The energy consumption of white LEDs is only that of incandescent lamps and that of energy-saving lamps. And the light source of the LED lamp does not contain harmful metal mercury. The high-pressure sodium lamp light source contains metallic mercury and metallic sodium (turned into mercury vapor and sodium vapor after being energized), and has a short lifespan (compared to LEDs), and subsequent waste treatment will pollute the environment. The LED lamp has good shock resistance and convenient transportation. The solid-state package belongs to the type of cold light source. So it is very convenient for transportation and installation.

.Comparison of structure and cost

LED lamps are generally grainy, and their light-emitting positions are relatively concentrated. Therefore, the LED needs to be better designed on the uniform light, and the point light source should be expanded into a surface light source as much as possible to improve the comfort of the eyes. Furthermore, many products will be designed with LED dimming to save energy. At present, most of the LED street lamps designed and produced by manufacturers are extremely heavy, often exceeding kilograms. Such a large dead weight tends to cause the lamp pole to be overwhelmed and reduce its wind resistance. Most manufacturers of LED lamps design LED lamps to be replaceable, that is, to directly replace existing lamps. And increase the LED current to reduce the number of wicks while maintaining the same brightness to save costs, or to reduce the PCB area.

LED lamp beads parameters:

Low power lamp beads: red and yellow: ..V. Blue, green and white: .V. Rated currents are all milliamperes

High-power lamp beads: Watt: .V, mA.

led street light series