Functions and Roles of Streetlight Lenses

Release Date:

2021-05-26 11:22

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Streetlight lenses are specifically designed for high-power LED streetlights and can be used in conjunction with high-power LEDs. Streetlight Lens This article focuses on streetlight lenses specially developed for high-power LED streetlights. Their key feature is compatibility with high-power LEDs.

Streetlight lens Specifically designed for high-power LED streetlights and compatible with high-power LEDs.

Streetlight lens

This paper focuses on street‑light lenses specifically designed for high‑power LED street lamps. Its key feature is compatibility with high‑power LEDs.

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1. Streetlight lens Glass lens

Due to its high-temperature resistance and excellent light transmittance, glass remains a popular material among many LED streetlight manufacturers.

However, due to its heavy weight, fragility, and high cost, glass is subject to certain limitations in its applications.

2. PC or PMMA material

Both of these materials fall under the category of optical plastics; they can be molded via injection molding, making it easy to achieve aspheric light focusing and reducing the yellow halo effect around the light spot.

However, the permeability of PC and PMMA is second only to that of glass, and their heat resistance is inferior to that of glass.

However, PC and PMMA offer distinct advantages in terms of material properties and production costs.

II. Specifications of Streetlight Lenses

1. Angle Specification

Since different roads have varying optical requirements—such as streetlight height, spacing between poles, and road type (main roads, arterial roads, side streets, courtyards, etc.)—the required beam angles of streetlight lenses also differ.

Generally speaking, Streetlight lens The condenser lens angle specifications are: 60°, 80°, 100°, and 120°.

Typically, the height of a main streetlight pole is 10–12 meters, with a spacing of 30–35 meters between poles. Based on these dimensions, the required beam angle for the streetlight lens is 100–120 degrees.

2. Spot Specifications

Circular light spots, typically used for courtyard pathways; the illuminance range and illumination requirements are not particularly high.

Oval-shaped light spot (e.g., Renda Optoelectronics model ST-V20H-LT2060) Streetlight lens ) Typically used on motor vehicle or non-motorized vehicle lanes. When the circular spot is illuminated, a dark spot appears on both sides at the intersection of the circles. In certain areas, the light is unevenly distributed across the roadway, or part of the circular light pattern extends beyond the road surface, meaning it is not actually being utilized;

Rectangular light spots (such as those from Danyang Ling and Midea’s DG-ST107) are used on motor vehicle lanes, effectively leveraging LED illumination to distribute light uniformly across the road surface, resulting in a consistent light pattern.

Relatively speaking, streetlight lenses must meet requirements for light output, beam‑angle control, and uniformity of the light spot. Whether the illuminance levels on roadways comply with relevant standards is a key consideration for streetlight manufacturers during the design process—such as selecting appropriate power ratings, choosing LEDs from different brands, and opting for LED luminous‑flux (LM) values that vary among models.

3. Lens Size

Single lens

Combine multiple individual streetlight lenses (one lens per LED). The advantage of this approach is its flexibility.

For example: use any number of LED lenses and arrange (layout) them as needed;

Streetlight lens module (multi-head)

To make efficient use of luminaire space and reduce the structure’s size and weight, many manufacturers have begun adopting streetlight lens modules, some of which feature more than 28 four-by-seven optical elements.

Streetlight lens The module can also be integrated to achieve a waterproof structure for streetlights.


Keywords:

Streetlight lens

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