Spring rain why LED street is ideal?

In the spring morning and afternoon showers are common. In these low visibility conditions, on the road driving or walking very difficult for drivers and pedestrians, but LED road lighting modern technology is for travelers to provide more secure spring travel.

Driving in the spring weather conditions

The rain reduced visibility, especially at night. It directly affects the human visual perception, as it directly with the headlights, windshield, roads and road marking contact, changes in visibility. When the sun lights, car headlights or light reflected from the object back to the eyes, we usually see objects; the rain will interfere with the process in a variety of ways.

Through the filter part of light output and reduce the efficiency of lighting on the road ahead, the rain will reduce the headlights and other light sources.

When the light rain, only a portion of the light through, the rest scattered. Therefore, the rain blocked some of the reflected light, less light is shone into the driver's eyes.

The poor visibility makes people focus on the front, which reduces the ability of peripheral areas.

The rain will affect visibility by changing the amount of light reflected from the road back to the driver's eyes. The rain makes the road marking more obvious. The paint includes the use of reflective materials in road signs. In dry conditions, headlight illumination reflected from the reflective paint to the driver's eyes. However, the lens of water like a scattering of light, which means many light is reflected in a different direction. The driver can hardly see the line.

In the spring, many places in the world, the fog is very common. Because the driver's visibility is restricted in the depths of the fog, so will cause a lot of traffic accidents. Because of the fog will affect the speed and distance of the driver's judgment, will also increase the occurrence of accidents. We see objects based on their brightness is not absolute, but based on the differences between the object and the background brightness. The fog reduces the contrast, so the objects become increasingly dim. This makes in foggy conditions will be more difficult to drive.

Increase road safety for LED lighting

In the rain and fog, modern lighting technology is to increase the safety of drivers and pedestrians.

LED can be reflected in three aspects in the fog and rain advantage:

The direction of the light beam from the inherent

The wavelength characteristics of white LED

Compared with the other light source, the wavelength of the frequency

The difference between the LED lighting and all other sources are the main wavelength it emits energy and water, and how the wavelength of the beam interaction or mutual influence, especially the size of water droplets will change.

The main light source, light emission in the blue wavelength visible spectrum in LED, better than other light sources in low visibility conditions.

In the spectral range of purple area in the light than in red light with shorter wavelength region. Water vapor particles in the atmosphere is often in yellow - Orange - red light range, but they tend to scatter blue light. This may be because the water particles are usually similar to blue wavelength. So when (or in the air is an invigorating autumn climate After rain the sky looks blue. coarse particles, with molecular scattering mainly), in the strong scattering effect of atmospheric molecules, the blue light is scattered to diffuse sky blue sky, that is. This phenomenon is called Rayleigh scattering.

In low visibility conditions, water particle size will increase to no longer with the blue wavelengths of similar size degree. At this point, their size and the yellow orange red wavelength. Water particles tend to suppress these in light scattering and light, but through blue. This is why the sun sometimes due to fog and the causes of the blue or green.

From the water particle size to wavelength, LED is the best choice under the conditions of low visibility. To create the best conditions of the road lighting design for color temperature and rain period. By improving the visibility, LED can keep the road safety in the rain and foggy environment. (compiled: LED James)

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