We, YULAN ELECTRICAL CO., LTD., were founded in 2002 and are a company specializing in the outdoor lighting industry. With nearly 20 years of experience in the lighting industry, as well as a rich product line and strong research and development capabilities. We are committed to providing high-quality outdoor lighting products and services to global customers, helping urban lighting projects and green environmental protection development. Our company currently has stable business dealings with clients in Thailand, Vietnam, and the Middle East. Products has also received positive feedback from customers. Especially some customized products have helped customers to win more project opportunities in their local market, and our products have also won a good reputation.
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High Quality
Excellent design, high-quality materials, strict manufacturing, comprehensive testing, and excellent customer service are reflected.
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Customized Service
Listening to needs, personalized design, detail customization, exclusive production, and thoughtful after-sales service reflect customized services
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Professional Team
Team professional skills, efficient collaboration, in-depth industry knowledge, and high-quality customer experience demonstrate professional services
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Custom Service
Quick response, problem-solving, personalized care, continuous follow-up, exceeding expectations to showcase customer service
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250W HPS Traditional Street Lights Outdoor Die-casting Aluminum
These outdoor 250W HPS traditional street lights feature die cast aluminum casing treated with
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70w/150w/250w/400w HPS Outdoor Street Lights Fixture Lamp
Our 250w/400w HPS outdoor street lights fixture are widely used in various road surfaces and
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250w 400w High Pressure Sodium Street Lights
High pressure sodium street lights have a long service life. The surface of the shell has been
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Decorative Leaf 150w Hpsv Street Light
Description: This 150w Hpsv Street Light is made of aluminum body and pc cover. It has the unique
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E39 E40 HPS Round Aluminum Die-casted Traditional street light Fitting
This HPS Round glass light fitting is made of aluminum body and pc cover. It has the unique design.
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HPS Street Light Industrial Lamp Post 150w-400w
Description: This industrial lamp post is made of casted aluminum body and special pc cover. It has
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What is high pressure sodium lamp (hPS)
High pressure sodium (HPS) refers to a gas discharge lamp that uses sodium in an excited state to generate light. These lights are known for their high efficiency and long lifespan, making them a popular choice for outdoor lighting applications such as street lights, parking lot lighting, and some industrial environments. HPS lamps emit characteristic warm yellow orange light and are particularly valued for their ability to provide strong illumination with relatively low energy consumption. However, compared to other lighting technologies, their color rendering index (CRI) is usually lower, which means they are not the best choice for applications where color accuracy is crucial. However, over the years, their durability, efficiency, and wide area coverage have made them the main products for outdoor and industrial lighting.
Characteristics of High Pressure Sodium Lamp (HPS)
Energy Efficient
Compared to other types of lighting, high pressure sodium lamps have a higher energy efficiency ratio, providing more light output and lower electricity consumption.
Yellow Spectrum
The light emitted by high pressure sodium lamps is mainly concentrated in the yellow spectral area, which makes them more permeable in fog and rain.
Long Lifespan
The service life of high pressure sodium lamps is usually long, reaching thousands of hours, which reduces the frequency of replacement and maintenance costs.
Suitable For Outdoor Use
Due to its spectral characteristics and long lifespan, high pressure sodium lamps are often used for street lighting, parks, and other outdoor areas.
working principle of a High Pressure Sodium (HPS) lamp
This working principle makes HPS lamps well-suited for applications requiring long-duration lighting and high energy efficiency, such as street lighting and industrial area illumination.
Arc Discharge
When an electric current passes through the lamp, a high voltage arc is generated within the xenon gas inside the bulb.
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Gas Heating
The heat generated by the arc heats the sodium and mercury, causing them to transition from a solid or liquid state to a gaseous state.
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Light Production
Once the sodium and mercury vapors reach a sufficient temperature, they begin to emit light. The light produced by sodium vapor is predominantly in the yellow spectrum, which is characteristic of HPS lamps.
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Light Output
As the temperature and pressure inside the bulb stabilize, the lamp continuously emits a steady light.
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Application scenes of high pressure sodium lamp
High pressure sodium lamps are widely used in various scenarios due to their high energy efficiency, long lifespan, and strong illumination ability, mainly including
Street lighting
High pressure sodium lamps are a common choice for street and highway lighting because they can provide a wide range of light, suitable for nighttime driving and pedestrian safety.
Industrial area lighting
In industrial areas and manufacturing plants, high pressure sodium lamps are widely used due to their ability to provide strong light, which helps improve the safety and efficiency of night work.
Parking lot lighting
High pressure sodium lamps are also commonly used in large outdoor parking lots because they can evenly illuminate large areas, improving the safety of parking and walking at night.
Agriculture
In some agricultural applications, high pressure sodium lamps are used in greenhouses and plant growth chambers to promote plant growth.
Sports and outdoor activity areas
High pressure sodium lamps are often used to illuminate sports venues, sports fields, and other large outdoor activity areas due to their high light output.
Safety and monitoring
The strong illumination of high-pressure sodium lamps is commonly used to improve the nighttime safety of public and private property, especially in areas covered by surveillance cameras.
FAQ
01.What are the advantages and disadvantages of high pressure sodium lamps compared to LED lamps?
The advantages of high pressure sodium lamps include high energy efficiency, long lifespan, and strong lighting ability, making them particularly suitable for outdoor lighting. The disadvantages include poor color reproduction index (CRI) and longer preheating time. LED lights provide better color reproduction, longer lifespan, and lower energy consumption, but with higher initial costs.
02.What is the color temperature of high pressure sodium lamps?
The color temperature of high pressure sodium lamps is usually between 2000K and 2700K, emitting warm yellow light.
03.Can high pressure sodium lamps be used for indoor lighting?
Although high pressure sodium lamps are mainly used for outdoor lighting, they can also be used for indoor lighting in some specific industrial and agricultural applications, especially in situations where precise color recognition is not required.
04.Why does the color of the high pressure sodium lamp change when starting?
When the high pressure sodium lamp is started, it takes some time for the gas and metal vapor inside the lamp to reach the working temperature. During this process, the color of the lamp may change from dark red to yellow, as the sodium vapor gradually heats up and begins to emit its unique yellow light.
05.How long does it take for a high pressure sodium lamp to start?
06.Why do high pressure sodium lamps perform well in rainy and foggy weather?
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