LED street lighting is not energy-saving at this stage?
It is common sense that when discussing a problem, you will stand on your own stand. Debating your own opinions will always win the upper hand. This is common sense. There are many debates on LED lighting, which can be described as "hot" by the participants. Before the debate, I think everyone will know who can win! The reason is simple. The future is that LEDs are not suspenseful, it is just a matter of time. Obstacles to time progress are nothing more than two aspects, one is light efficiency; the other is cost performance.
When we are watching a movie, we encounter justice and evil struggle. We will all understand the ending. Now you just watch the process. It's just the best metaphor for "LED Lighting Debate." I think it’s better to be practical, instead of paying taxpayers’ money for the LED lighting project. The state's investment should mostly be LED basic application research, which is beneficial to the development of the entire LED industry.
Usually, LED lighting design lamps are halved compared to traditional energy-saving lamps. For example: LED design for 40W fluorescent tube generally uses less than 20W power; 250W street light uses LED street light usually designed to about 100W power. This is the reason why LED lighting is energy-saving. If we directly halve the power of traditional lamps, power saving will have the same effect.
Why is the power halved design required? The main reason is cost. Cost can be divided into direct price cost and heat dissipation input cost. At this stage, the design cost of LED lighting lamps is 10 times that of traditional energy-saving lamps, and the design of halving the power is the most effective way to reduce costs. With the increase of the concentrated power of the LED lamp design, the cost will increase exponentially, and the design may even be unable to be completed. Imagine the cost and heat dissipation conditions of a street lamp centralized design of 250W?
LED lighting has "directivity theory". The reason is that the LED has a high degree of consistent light directivity, and the light emitted is fully utilized toward the front. For me personally, I do not oppose this doctrine, nor do I agree with this viewpoint. I hope that all of us will view this issue in a pragmatic manner. When designing products, it is necessary to reflect the light from the periphery and the back to the front for reasonable use to achieve the ideal condensing effect. Traditional lamps have always been used in this way. LEDs cannot withstand higher junction temperatures and need a sufficient cross-sectional area to conduct heat, otherwise it can be completely connected to package 360-degree light-emitting LEDs.
LED directivity is actually the result of the optical structure of the package bracket. The "directivity theory" is the "life-saving straw" explaining the LED energy-saving theory at this stage. From the historical development point of view, there has been a precedent in this regard.
A few years ago, domestic LED miner’s lamp design manufacturers used 8mm small-angle LED design miner’s lamps. The good directivity meets the national coal mine safety standards. The brightness can be seen at a glance. It is much lower than traditional lamps. For us miners, we only have the right to Without going to the mine, there is no right to choose what kind of lamp to use, but I also accepted this lamp under the condition of only observing.
The same is true for the problem of street lamp illuminance. Some things cannot be controlled by the general group. In order to be beautiful, the street lights will be set up with symmetrical 4-10 rows of street light sources. Remember that in the hometown, only 1-2 rows of lights will be turned on at night to save electricity, but in Shenzhen, all the street lights will be lit no matter how many. So do we criticize the lack of illumination in our hometown or praise the government's pragmatic economy? Or does it mean that Shenzhen's economic strength does not care, or criticize Shenzhen for being too wasteful? Once at 3 o'clock in the morning, from Shenzhen Luohu to Shekou, I didn't see the street lights have halved the brightness during the period, and I didn't see the street lights were partially turned off.
It is "difficult" to appreciate the moonlight on the streets of Shenzhen at night. When we were young, we used kerosene lamps to learn, and we didn’t feel invisible. I don’t know how it would feel to go back to the past. It is said that when Shuji Nakamura, the father of Blu-ray, gave a speech at Sichuan University, he could only vaguely see the appearance of Blu-ray. At that time, the students were very excited. Now what would you want to see if you meet him?
It is the most basic for designing products to comply with national standards, but it needs to be recognized by the general public, and it takes time to verify. The opinions of a few people are for reference only, and no simple conclusion can be drawn. I still said "the energy-saving directional theory, I do not agree with it, nor do I oppose it."
