Principle of LED Street Lamp Cap

The integrated design of the heat sink and lamp housing of the LED street lamp head ensures that the LED is directly connected to the shell and dissipates heat through the shell's cooling wings and air convection, fully ensuring the LED street lamp's 50000 hour service life. Based on working 12 hours a day, its lifespan is also over 10 years, and maintenance costs are extremely low; The lamp housing is made of aluminum alloy die-casting, which can effectively dissipate heat, prevent water and dust. The surface of the lamp has been treated with UV resistance and corrosion resistance, and the overall lamp meets the IP65 standard;

The design adopts a single elliptical reflection cavity combined with a spherical solitary surface to control the light emitted by the LED within the required range, improving the uniformity of the lighting effect and the utilization of light energy, and highlighting the energy-saving advantages of LED street lights. Compared to traditional sodium lamps, it can save more than 60% of electricity.

The advantages of LED street lamp heads

• The characteristics of LED street lamp heads themselves - the unidirectionality of light, no diffusion of light, ensuring lighting efficiency.
• The LED street lamp head has a unique secondary optical design, which illuminates the light of the LED street lamp head to the required lighting area, further improving the lighting efficiency and achieving energy-saving goals.
• The light source efficiency of LED street lamp heads has currently reached 110-130lm/W, and there is still great room for development, with a theoretical value of 250lm/W. The luminous efficiency of high-pressure sodium lamps increases with the increase of power, therefore, the overall luminous efficiency of LED street lamp heads is stronger than that of high-pressure sodium lamps; The overall light efficiency is theoretical, and the advantage of high-power LED street lamp holders is that the light efficiency of high-pressure sodium lamps above 250W is actually higher than that of LEDs.
• The color rendering performance of LED street lamp heads is much higher than that of high-pressure sodium lamps, with a color rendering index of only about 23. However, the color rendering index of LED street lamp heads reaches 75 or above. From a visual and psychological perspective, when achieving the same brightness, the average illuminance of LED street lamp heads can be reduced by more than 20% compared to high-pressure sodium lamps (referring to the British lighting standards).
• The light attenuation of LED street lamp heads is small, with less than 3% of the light attenuation in one year. Even after 10 years of use, they still meet the requirements for road illumination. However, high-pressure sodium lamps have a large attenuation, which has decreased by more than 30% in about one year. Therefore, LED street lamp heads can be designed with lower power consumption than high-pressure sodium lamps.
• LED street lamp heads are equipped with automatic control energy-saving devices, which can achieve maximum power reduction and save electricity while meeting lighting requirements at different time periods. The Casyoo LED street Light head can achieve user-friendly functions such as computer dimming, time-based control, light control, temperature control, remote control, and automatic inspection.
• LED is a low-voltage device, and the voltage driving a single LED is a safe voltage. The series of products have a single LED power of 1 watt, so it is a safer power source than using a high-voltage power source, especially suitable for public places (such as street lighting, factory lighting, automotive lighting, civilian lighting, etc.).
• Each unit LED chip has a very small volume, so it can be prepared into various shapes of devices and is suitable for variable environments.
• Long lifespan: Can be used for over 50000 hours, providing a three-year quality guarantee. The drawback is that the lifespan of the power supply cannot be guaranteed.
• High light efficiency: Using chips with a capacity of ≥ 100LM can save more than 75% energy compared to traditional high-pressure sodium lamps.
• Easy installation: No need to bury cables or rectifiers. Simply install the street lamp holder onto the lamp post or nest the light source into the original lamp housing.
• Excellent heat dissipation control: In summer, the temperature is controlled below 45 degrees Celsius and passive heat dissipation is adopted, resulting in insufficient heat dissipation guarantee in summer.
• Reliable quality: All circuit power supplies are made of high-quality components, and each LED has a separate overcurrent protection, so there is no need to worry about damage.
• Uniform color of light: Without adding a lens, uniform color of light is not sacrificed to improve brightness, thus ensuring uniform color of light without aperture.
• LEDs do not contain harmful metal mercury, unlike high-pressure sodium lamps or metal halide lamps that pose a threat to the environment when discarded.

Disadvantages of LED street lamp heads

• The power of a single LED is low. To achieve high power, multiple devices need to be used in parallel.
• Low color rendering index. The color displayed under LED illumination is not as real as that of incandescent lamps, which needs to be analyzed from the perspective of spectral distribution and is a technical issue.
• Spot. Due to defects in the manufacturing process of white LED and fitting errors with reflective cups or lenses, it is easy to cause the problem of "yellow circles".
• The issue of LED illumination uniformity: If secondary optical design is not carried out, the illumination of LED lighting products will be relatively concentrated, so secondary optical design must be carried out to make the light intensity distribution map form a bat shape.
• The issue of LED light attenuation. Compared to low-power LEDs, high-power LED street lamp heads have much better light attenuation.