Reasons why lower-power LED street lamps replace higher-power high-pressure sodium lamps

With the continuous maturity of LED technology, more and more areas use LED street lamps, and the number of high-pressure sodium lamps is gradually decreasing. Because LED street lights have low energy consumption, energy saving and environmental protection. Low-power LED street lamps can replace higher-power high-pressure sodium lamps, which has great economic benefits. Moreover, the price of LED street lights is not expensive, and at the same time has a high cost performance. At this time, someone will ask 'Why lower-power LED street lamps can replace higher-power high-pressure sodium lamps?' Below are street lamp manufacturers to show you the reasons.

High-pressure sodium lamp is a point light source, which is a degree of luminescence. In fact, there is very little light applied to the irradiation direction, only about %. Therefore, the high-pressure sodium lamp must reflect the light in the non-irradiated direction through the reflector in the lamp to achieve the purpose of higher light utilization. Due to the design and cost of street lamps, the efficiency of sodium lamps is only %. The LED street lamp is a surface light source, the light emitting surface is a single direction, the light source utilization rate is high, and the lamp efficiency reaches more than %. In this way, everyone may still not understand. Let's take W LED street lights and W high pressure sodium lamps as examples to illustrate this problem.


.W LED street light initial luminous flux lm. Because of lens loss% and power loss %, the luminous flux of the lamp is actually lm, and the total power consumption of the lamp is W. Therefore, the luminous efficiency of this LED street light is lm/W.
The initial luminous flux of the .W high-pressure sodium lamp is lm, the light source utilization loss is about %, the power loss is about %, the actual luminous flux of the lamp is lm, and the total power consumption of the lamp is about W. Therefore, the luminous efficiency of this high-pressure sodium lamp is .lm/W.



Through the above analysis and comparison of the final luminous efficiency value, we can find that the luminous efficiency of the W LED street lamp is almost twice the luminous efficiency of W high-pressure sodium. Therefore, we can infer the reason why lower-power LED street lamps replace higher-power high-pressure sodium lamps. With the advancement of technology, many street lamp manufacturers are constantly developing and improving LED technology. I believe that in the near future, not only the efficiency of LED street lamps will increase, but the price of LED street lamps will become more and more affordable!