In the fields of agriculture and horticulture, COB LED and HPS are the two most popular lighting solutions. Both can simulate natural light, providing plants with sufficient light energy to promote growth. If you’re not yet familiar with the differences between the two, don’t worry—this article will help you understand the distinctions between COB and HPS!
What is COB LED?
COB LED stands for Chip-On-Board Light-Emitting Diode. Its technical principle involves attaching multiple LED chips to a PCB circuit board to form a lighting module, ensuring uniform light distribution and achieving a compact, high-density LED lighting effect.
What is HPS?
In the lighting field, HPS stands for High-Pressure Sodium lighting, a practical lighting tool. Its technical principle involves a chemical reaction between current and sodium vapor, causing sodium particles to release energy and emit yellow-orange light, achieving large-area, high-lumen lighting effects.
Main Differences Between COB LED and HPS
Energy Efficiency
Lumens per watt and luminous flux are indicators used to assess the energy efficiency of lighting equipment. Through professional equipment measurements, it can be determined that COB LED has higher lumens per watt and luminous flux than HPS, making COB LED more energy-efficient, reducing electricity costs, and minimizing the carbon footprint of artificial light sources.
Environmental Impact
COB LED can convert a maximum proportion of electrical energy into light energy, producing minimal thermal energy, and complies with EU environmental standards. In contrast, HPS’s high-lumen lighting generates more thermal energy than COB LEDs, resulting in a larger carbon footprint than COB LEDs. This can alter the surrounding environment to some extent and have an impact on nearby plants. Additionally, HPS contains mercury, a toxic element. If HPS is broken or improperly disposed of, the mercury can seep into the soil, causing environmental pollution.
Light Quality
Both COB LEDs and HPS provide full-spectrum lighting. However, COB LEDs distribute light evenly across the entire spectrum, supporting photosynthesis at all growth stages. In contrast, HPS light is concentrated in the yellow to red wavelength range, only supporting rapid growth in plants that require yellow and red wavelengths. For plants that require blue and red wavelengths to grow, HPS can hinder their development.
In terms of light intensity, the measured values for COB LEDs and HPS are very close, but the degree of light concentration differs. COB LEDs provide balanced lighting, while HPS provides concentrated high-lumen lighting.
Lifespan
In terms of lifespan, there is a significant difference between COB LED and HPS. According to data results, the lifespan of COB LED is 60,000 hours, while that of HPS is 24,000 hours. Comparing the two, it is clear that COB LED can last 36,000 hours longer than HPS, significantly reducing replacement costs.
Installation
Depending on the application and design requirements, the installation methods for COB LED and HPS vary. In the lighting field, COB LED is relatively lightweight and only needs to be secured to a support structure and grounded. During this process, you also need to set up the wiring and adjust the height and beam angle to ensure that the COB LED light effectively covers the intended area. HPS is heavier and requires screw-based fixation. It is typically installed near the power source to minimize the hassle of multiple power cable connections.
Maintenance
Different lighting devices have different maintenance requirements. HPS generates significant heat during operation, so it is essential to maintain good airflow in the surrounding space to extend its lifespan. Additionally, HPS has a shorter replacement interval than COB LED and requires regular maintenance and replacement to maintain optimal performance.
COB LEDs do not require frequent replacement like HPS, but after prolonged use, their surfaces may accumulate dust, necessitating regular cleaning with a soft cloth. Additionally, the support structure and connection cables of COB LEDs should be inspected for damage to prevent accidents.
Cost
In terms of price, COB LEDs are much more expensive than HPS, because COB LEDs perform better than HPS. However, after prolonged use, HPS needs to be replaced, and the cost of replacement added to the original price may be higher than the price of COB LEDs. Therefore, you can choose between COB LEDs and HPS based on the desired usage time and cost.
Application
In addition to lighting applications, COB LEDs can also be used in the display field. In the display field, COB LEDs can be made into LED display screens, offering high contrast and clarity, with colors that closely resemble real-world hues, providing an exceptional viewing experience.
Beyond agricultural applications, HPS can also be used in commercial settings such as shopping malls and trade centers. In these environments, HPS provides excellent lighting, allowing you to clearly see the details of displayed items and enhancing your viewing experience.
Conclusion
After reading this article, you should be able to easily distinguish between COB LED and HPS. If you wish to learn more, please visit the JYLED official website.
