Why Are Street Lights Usually Yellow?

He who lights our paths small light sources They are everywhere with millions of them. While the type used plays an active role in this regard, it also has some effects on traffic.

Without further adoing the topic Why is yellow light so common? Let’s see how it is used all over the world.

The main cause of yellow is the type of light source used.

Usually in street lamps high pressure sodium vapor lamps is being used. these bulbs longest lasting light sources It is preferred because it is. YBSB bulbs used in urban roads, streets, squares and avenues; It contains sodium, mercury and xenon. When current passes through it, the elements combine with the yellow-orange sodium light to give off blue-white light before evaporating and create a whiter color, resulting in yellow-orange light.

Also low pressure sodium vapor lamps there is. These are preferred in express roads, ports, loading and unloading areas and security lighting. Low-pressure lamps, which are also used in areas where it is important to prevent light pollution and where natural life needs to be protected, consist of argon and neon gas. When current passes through the lamp, these gases its temperature increases and sodium evaporates. Yellow-orange light is emitted by evaporating sodium.

So why yellow light?

Of course, there is more than one reason for this. First of all, let us point out that YBSB bulbs are used in many parts of the world. The most important reason is high light efficiency. Of course, longevity is another important point why it is preferred.

Of course, when we consider that it is placed in every street, tunnel and road of the city. to be cheap is also important. When this was decided in the late 1980s, sodium vapor bulbs were cheaper than other bulbs.

The fact that it is both economical and environmentally friendly causes us to encounter yellow on the streets. In addition, since yellow light scatters less in the atmosphere, it is particularly in foggy weather It provides better vision than blue light.

High pressure sodium vapor lamps The downside is that it makes every object look yellow. However, on the streets and roads this does not matter much, because the purpose is not the color but the shape and size of the object.

Why not use LED bulbs?

In the years when LED bulbs came into our lives, their costs were quite high, especially when you consider that they all had to be changed. costs would increase altogether. Although LEDs have various advantages such as energy efficiency and long life, there are reasons why they are not on the streets.

Studies have shown that the light emitted by LEDs regulates the sleep-wake cycle. suppresses the hormone melatonin among its negative effects. Features such as brightness, glare and flickering are also effective in the continued use of high-pressure bulbs.

Sodium lights have a distinct as long as no disadvantages arise It looks like we won’t see LED lights on the streets for a long time.

When you encounter a yellow light on your next night walk or journey, you can enjoy adding this information to your memory.

“Why is this like this?” We welcome any questions you may have in the comments. Maybe you will decide the topic of our next content. Why not?

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