1. The brightness of an LED directly affects its price. Higher brightness typically means a higher cost. For LED lighting products, the LEDs must meet the safety standard of Class I laser compliance.
2. Anti-static performance is crucial for LED longevity. LEDs with strong anti-static capabilities (usually over 700V) tend to be more expensive due to their durability and reliability in various environments.
3. LEDs with the same wavelength produce the same color. Ensuring consistent color output requires precise manufacturing, which is difficult without proper equipment like spectrophotometers. This precision leads to higher costs for pure-color LED lighting.
4. LEDs are designed to conduct electricity in one direction only. If reverse current occurs, it's referred to as leakage. High leakage current can significantly reduce the lifespan of an LED, resulting in lower prices.
5. The illumination angle of an LED determines how light is distributed. Special angles, such as full diffusion, offer better lighting coverage and are usually more expensive due to their advanced design and application versatility.
6. The lifespan of an LED depends on light decay. LEDs with slower light decay last longer, making them more expensive but also more cost-effective in the long run.
7. The quality of the wafer used in LEDs plays a big role in pricing. Japanese and American wafers are generally more expensive compared to those from Taiwan and China, reflecting differences in technology and production standards.
8. Larger wafer sizes often result in better-quality LEDs. The size of the wafer correlates with both performance and price, as larger wafers allow for more efficient and stable light output.
9. The encapsulation material used in LEDs varies. Standard LEDs use epoxy resin, while those with UV-resistant and flame-retardant properties are more costly. High-quality outdoor LED lighting should include these features for enhanced durability and safety. Each product is designed with specific purposes in mind, and reliable LED lighting must ensure electrical, fire, environmental, mechanical, health, and usage safety. Compliance with international and national safety standards is essential for electrical safety in LED products.
(Word count: 505)Electric valve is a device that drives the valve to open and close by electric motor. It is widely used in various industrial and civil fields, such as metallurgy, chemical industry, petroleum, natural gas, heating, ventilation and air conditioning, automatic control, etc. The following are some application scenarios of electric valves:
1. Fluid control in industrial production: electric valve can be used to control the flow, pressure and temperature of liquid, gas and steam to meet the needs of industrial production.
2. Oil and natural gas industry: electric valves can be used in oil and natural gas exploitation, processing, transmission and storage to control flow and pressure and ensure production safety and efficiency.
3. Chemical industry: electric valve can be used for fluid control in chemical production, such as acid-base solution, gas and liquid reactant control, to ensure the safety and efficiency of production.
4. Heating, ventilation and air conditioning system: the electric valve can be used to control the water flow, air flow and temperature in the heating, ventilation and air conditioning system to meet the requirements of the indoor environment.
5. Automatic control system: electric valve can be used with automatic control system to realize automatic control and adjustment of fluid flow, pressure, temperature and other parameters.
In short, electric valves are widely used in industrial and civil fields, which can improve production efficiency, ensure product quality and improve production safety.
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