Asymmetric Light Distribution LED Street Light

Basic Info

A professional luminaire specifically optimized for roads with lighting on only one side(e.g.,roads with physical median separation,ramps,embankment roads).Its light pattern features a pronounced asymmetric distribution,directing the vast majority of light precisely toward the road side.This ensures high illuminance and uniformity on the roadway while significantly reducing spill light and glare toward the opposite side(e.g.,buildings,green belts),achieving high energy efficiency and light pollution control.

Key attributes

Housing Material

Die-cast aluminum

Optical Lens

Asymmetric free-form PMMA lens / Multi-curve aluminum reflector

Light Source Type

Linearly arranged COB or SMD LED modules

Driver Power Supply

IESNA Type II (Medium Throw), Type III (Long Throw), Type IV (Very Long Throw)

Mounting Method

Side-mounted on bracket, with horizontal rotation adjustment

Input Voltage

AC100-277V, 50/60Hz

Protection Rating

IP66

Power Factor

>70%

Correlated Color Temperature

4000K / 5000K

Smart Control

High SRI

Customer reviews

Mike Jordan · Major Engineering General Contractor Site Manager

Large-scale projects require high installation efficiency. The modular design and quick-connect connectors of these railing lights enabled our crew to work in an “assembly-line” style efficiently. The manufacturer’s installation guide videos and detailed spacing/power calculation tools also greatly assisted with pre-planning and on-site construction, ensuring the project was completed on time and to a high standard.

Father Richard Moore · Parish Building Committee Chairman

Used for nighttime floodlighting of a historic church façade. We chose the 3000K CCT and high-CRI version. The colors and textures of the brickwork were faithfully rendered, creating a solemn and warm visual effect. The precise beam angle control prevented light 'spill' into unwanted areas, earning recognition from the heritage preservation unit.

Marcus Johnson · Municipal Engineer

After installing your modular LED street lights, the road uniformity in our district has significantly improved. Our maintenance team particularly praised the modular design: last month, a faulty module was replaced quickly in just 15 minutes without affecting nighttime traffic. The annual energy audit showed an electricity saving rate of 58%, fully meeting the project's expectations.

Product Description

Product Features:

The design centers on specially engineered secondary optics(lens or reflector),which shape and redirect the emitted LED light to create an elongated rectangular or elliptical beam pattern aligned with the road's longitudinal axis.Its photometric distribution is markedly asymmetric in the transverse plane(C0-C180),featuring a concentrated and broad light intensity on the road side with a distinct cutoff on the opposite side.This approach enables notably high light utilization and enhances roadway lighting quality(SRI).The luminaire typically features a long,linear,and streamlined appearance.

Product Specifications:

Power ranges from 70W to 300W,meeting the needs of single-side lighting for roads of varying widths.Optical efficiency is high,with light flux utilization in the target area(roadway)reaching over 70%.Designed strictly according to IESNA Type II,Type III,or Type IV(short,medium,long throw)light distribution patterns.Operating voltage is AC100-277V.Protection rating is IP65 or above.Offers various beam angle selections to suit different mounting height to road width ratios(e.g.,use Type III when ratio is 1:1).

Product Applications:

Specifically for situations where streetlights must be installed on only one side.Examples include urban secondary roads with physical medians,riverside/lakeside roads,highway ramps and service roads,internal roads next to factory walls,and any location requiring strict control of light trespass into adjacent areas.During installation,ensure the luminaire’s orientation(polarization direction)correctly points toward the road centerline or the side to be illuminated.With precise light distribution,lower power and fewer luminaires can achieve equal or better roadway lighting effects compared to traditional symmetric lights,while significantly reducing disturbance to the surrounding environment(light trespass).

Frequently Asked Questions (FAQ)

Q：What is the difference between Type II, III, and IV distribution?

A：Type II is for sidewalks/road sides, with light spread wider on one side. Type III is longer throw, ideal for roadside mounting lighting the road and beyond. Type IV is very long, narrow throw for center median mounting.

Q：For a road that is 12m wide with poles on one side, which distribution is best?

A：With a typical 10m pole height (ratio ~1:1.2), Type III distribution is usually optimal, projecting light far across the road to achieve good uniformity.

Q：How does asymmetric lighting reduce light pollution?

A：By concentrating light precisely onto the roadway with a sharp cutoff at the house-side, it minimizes spill light and uplight (sky glow) into neighboring properties and the night sky.

Q：Can these lights be used for two-sided symmetrical road layouts?

A：While possible, it's less efficient. Symmetrical (Type I or V) distribution is typically more suitable for roads with poles on both sides, as it provides balanced illumination from both directions.

Q：What is 'SRI' (Streetlighting Index)?

A：SRI is a comprehensive metric evaluating a luminaire's on-road performance, including target area uniformity, glare control, and light trespass. High SRI values indicate superior overall lighting quality and visual comfort.

Q：How to ensure proper aiming during installation?

A：The luminaire body typically has an aiming mark. It must be aligned parallel to the curb line, and the tilt angle set according to the photometric report to ensure the light pattern falls correctly on the road.

Basic Info

Key attributes

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Product Description

Product Features:

Product Specifications:

Product Applications:

Frequently Asked Questions (FAQ)

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