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How to choose an LED lens?

Compared with traditional lighting fixtures, LED light sources have the advantages of higher light efficiency and light efficiency, longer lifespan, and no mercury. Under the trend of the scarcity of energy and increasing attention to environmental protection, governments have successively issued policies to restrict the production of incandescent Lights. And sales, creating conditions for the application of LED in lighting.

Countries have introduced policies to prohibit the sale of incandescent Lights as follows:

Australia stopped producing incandescent Lights in 2007.

The UK banned the sale of 100W incandescent Lights in 2009.

Canada banned the use of incandescent Lights in 2010.

China banned the import and sale of incandescent Lights greater than or equal to 100W in 2012. Our country stopped importing and selling incandescent Lights greater than 60W in 2014.

stopped importing and selling incandescent Lights above 15W in 2016.

Taiwan, China: Banned incandescent Lights in 2012.

The European Union banned 100W incandescent Lights in 2012.

Japan: Banned the production and sale of incandescent Lights in 2012.

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How to choose LED lens material?

The LED light bead itself generates a large amount of heat. And it emits a direct beam with a limited and dazzling illumination range. The LED lens can indirectly achieve the soft effect of light by changing the angle of the light and increasing the irradiation range. And at the same time, the loss of light efficiency is also very small, achieving special irradiation effects on different occasions.

As LED Lights and lanterns are used more and more widely in lighting applications, lenses, as one of the key components of Lights, are also becoming more and more popular.

Currently, the lens materials used in the industry are mainly PC, PMMA, and quartz glass. According to the requirements of different products and

terminal brands, they will select different types of materials.

The basic parameters of different lens materials are compared as follows:

Quartz glass: The primary light transmittance is 93%-94%, the flame resistance and temperature resistance are very good, it is not easy to process, the cost is high, it is fragile, and there are potential safety hazards. It is used in high-power LED lighting.

PMMA: Disposable light transmittance of 91%-93%, temperature resistance of about 90%, not flame retardant, easy to process, lower cost than PC, relatively brittle, buckles and locking screws are prone to cracking. Small size home lighting lens

PC: 88%-89% temperature resistance can reach 125 degrees Celsius, flame retardant V2 or more, easy to process, cost similar to PMMA, good willfulness, buckle and lock screws are not easy to crack, large-scale indoor and outdoor lighting.

Commercial and Industrial LED Luminaire Manufacturers Face Many Challenges

Lighting designs must be practical, attractive, and lightweight while also providing high light efficiency and light uniformity. To meet these complex standards, manufacturers are looking for materials that can provide design flexibility.

PC is significantly stronger than glass and PMMA in the field of LED lens applications due to the design advantages of PCs that can be used to design complex sharp corners, snaps, and notches, as well as excellent durability and strength.

In LED lighting fixtures. the lumen value (brightness) is a very important assessment standard. To achieve a high lumen value, there are mainly two ways to increase the light beads and use high light transmittance materials.

Considering the large heat generation of LED light beads, adding light beads will increase the heat dissipation function. And there are higher requirements for the temperature resistance and flame retardancy of the lens material, so it is undoubtedly the best solution to apply materials with higher light transmittance.

In addition, another challenge for LED designers is how to optimize the release of light inside the optical system. If they design not them properly, they can reduce the light output, generate unnecessary heat, and reduce device reliability and service life.

If we convert existing lighting to energy-efficient LED Lights, CO2 emissions would reduce by 600 million tons each year. If this statistic isn’t exciting enough, let’s look at the LED lights themselves, which have a longer lifespan than traditional incandescent bulbs, support new design concepts, imaginative lighting effects, and save space. Optical systems typically consist of lenses or reflectors, and their design can have a critical impact on the success of a luminaire in these areas.

Lenses and Mirrors

Although Lights are far more efficient than incandescent bulbs in terms of lumens per watt, emitters can only handle small amounts of power. Therefore, we must carefully control LED lumens to achieve the intended target. Optical components are an important part of the overall system. Any LED lighting system requires a lens or reflector, and these components help maximize the LED lumens.

A typical reflector is moulded from a polycarbonate sheet with a metalized reflective coating. While the lens ensures excellent beam control, this metal surface achieves high reflectivity.

We often use lenses in typical systems with small light sources and 1 to 4 LED chips. Good mirrors have many advantages in applications that require lenses that are too large or too expensive, such as those with large light sources, or if the light source contains multiple chips on a common phosphor layer.

As far as lenses are concerned, products currently on the market have different shapes and characteristics. Products with high-quality optical designs and materials are often relied upon when excellent light output over a long lifetime is required.

Long-term performance can be extremely important in some applications, especially street lighting or automotive lighting that relies on Lights to reduce replacement costs.

High-quality materials such as optical-grade polycarbonate or acrylic are highly efficient when first applied, and are well protected against degradation due to aging. And are resistant to environmental threats such as heat, cold, direct sunlight, or humidity.

Light distribution

No single standard can comprehensively describe the optical performance of a given lens. When determining the best lens for a given application, lighting designers need to understand several parameters and how they relate to each other.

Optical efficiency is a measure of the luminous flux emission capability of a lens, and lenses using high-quality optical-grade materials can achieve efficiencies over 90%. But that number doesn’t reveal anything about how the light from the lens is directed.

 Lens performance can be more fully described by other parameters, including half-maximum width (FWHM) angle and candela per lumen (cd/lm) value. Designers can use this data to better assess the lighting effects that can be achieved in terms of light intensity and distribution.

For a symmetrical lens with maximum intensity at the center of the light distribution, FWHM is the angle at which the light intensity is 50% of the central maximum. This provides an indicator of how narrow the beam is.

 To minimize uncertainty, suppliers may publish angles at 10% of maximum light intensity.

 This information helps designers evaluate the amount of stray light beyond the main beam. The small difference between 10% and the FWHM angle means that a single light can produce a narrow, focused beam.

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Which LED lens supplier is the best?

Now that the Internet is so developed, the Internet is full of various advertising promotions, reviews, hard and soft, and the question of which LED lens supplier is the best has made consumers unable to choose.

At this time, how we choose LED lenses is very blind. Of course, we must first choose the corresponding LED lenses according to our own needs, which is not only practical but also saves more resources!

First. Before purchasing a reliable LED lens, we must first confirm the qualifications of the company. Is it a well-known company in the country and what is its qualification? What is the user’s reputation?

Second. Why can the company provide a high-performance and high-quality LED lens to users? This requires confirmation of the resources of the enterprise, whether it has strong technical support, and it can generally operate stably for more than ten years.

Third. Product performance, stable performance, used customer renewal rate of more than 95% of the enterprise, the product performance will not be bad!

Fourth. The price of the product is transparent, and there is no arbitrary charge. The good ones are too expensive, and the cheap ones are not good. Therefore, it is necessary to weigh the cost performance of the product, the same configuration, and the same performance. The price plays a decisive role.

Fifth. After-sales service, whether the after-sales service can achieve 7*24 hours customer service + technical service, and timely service, users will be assured.

From the above points, I briefly analyze which LED lens supplier is the best and some basic situations that everyone needs to know. With the development of the market, as well as which LED lens supplier is the best, and which LED lens supplier is best, it also involves the technical threshold of the LED lens manufacturer. There are only a handful of businesses that have the strength to provide LED lenses, as long as you analyze and discuss them carefully. Get the product you want.

If you want to know more about LED lights, please don’t hesitate to get in touch with us.


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