Why LED Street Lights Lens Burst and How to Prevent It

LED street lights are widely used in urban areas for their energy efficiency, long lifespan, and environmental friendliness. However, some LED street lights may experience a sudden burst of the lighting lens, which can cause safety hazards and reduce the lighting performance. What are the reasons for this phenomenon and how can we avoid it?

Causes of LED Street Lights Lens Burst

The lighting lens of LED street lights is usually made of glass or plastic materials, which are transparent and have a certain refractive index. The lens can help to focus or diffuse the light emitted by the LED chips, and also protect the chips from dust and moisture. However, the lens may also be subject to various external and internal factors that can cause it to burst. Here are some possible causes:

Thermal stress:

The LED chips generate heat when they work, which can cause the temperature of the lens to rise. If the lens material has a low thermal expansion coefficient, it may not be able to withstand the thermal stress and crack. This can also happen if the lens and the LED module have different thermal expansion coefficients, which can cause uneven thermal expansion and contraction. Thermal stress can be aggravated by the temperature difference between day and night, especially in cold regions.

Mechanical stress:

The lens may be subject to mechanical stress from external forces, such as wind, rain, hail, snow, or vandalism. These forces can cause the lens to deform, crack, or shatter. Mechanical stress can also be caused by improper installation or transportation of the LED street lights, which can damage the lens or the LED module.

Chemical corrosion:

The lens may be exposed to various chemical substances in the air, such as sulfur, chlorine, bromine, or acid rain. These substances can react with the lens material and cause it to deteriorate, weaken, or discolor. Chemical corrosion can also affect the bonding between the lens and the LED module, which can reduce the adhesion and cause the lens to fall off.

UV degradation:

The lens may be subject to ultraviolet (UV) radiation from the sun, which can cause the lens material to degrade over time. UV degradation can cause the lens to lose its transparency, change its color, or become brittle. UV degradation can also affect the optical properties of the lens, such as the refractive index, which can affect the light distribution and efficiency.

Solutions for LED Street Lights Lens Burst

To prevent the LED street lights lens from bursting, we need to consider the following aspects:

Material selection:

The lens material should be chosen according to the environmental conditions and the optical requirements of the LED street lights. The material should have a high thermal expansion coefficient, a high resistance to thermal shock, a high mechanical strength, a high chemical stability, and a high UV resistance. Some common materials for LED street lights lens are borosilicate glass, polycarbonate (PC), polymethyl methacrylate (PMMA), and silicone.

Design optimization:

The design of the lens should be optimized according to the shape, size, and arrangement of the LED chips, as well as the desired light distribution and intensity. The design should also take into account the thermal management, the mechanical protection, and the chemical compatibility of the lens and the LED module. The design should avoid sharp edges, corners, or gaps that can cause stress concentration or crack propagation.

Quality control:

The quality of the lens and the LED module should be strictly controlled during the production, testing, and packaging processes. The lens and the LED module should be inspected for any defects, such as cracks, bubbles, scratches, or stains. The lens and the LED module should also be tested for their thermal, mechanical, chemical, and optical performance, and meet the relevant standards and specifications.

Installation and maintenance:

The installation and maintenance of the LED street lights should be done by professional and qualified personnel, following the instructions and precautions provided by the manufacturer. The lens and the LED module should be handled with care, avoiding any impact, vibration, or pressure. The lens and the LED module should also be cleaned regularly, using soft and clean cloth and mild detergent, and avoiding any abrasive or corrosive substances.

Conclusion

LED street lights lens burst is a common problem that can affect the safety and performance of the LED street lights. The problem can be caused by various factors, such as thermal stress, mechanical stress, chemical corrosion, or UV degradation. To prevent the problem, we need to pay attention to the material selection, design optimization, quality control, and installation and maintenance of the lens and the LED module. By doing so, we can ensure the reliability and durability of the LED street lights, and enjoy the benefits of LED lighting.

If you need to purchase lamps in bulk, please contact us.WOSEN is a professional manufacturer and supplier of Led Flood Light, Led Street Light, Led Solar Light, etc. For more information, please visit https://www.wosenled.com/ or contact admin@wosenled.com or WhatsApp +86-13425434349