Several things you need to know about LED Street Light
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Several things you need to know about LED Street Light
What’s LED street light?
A LED street light is a lamp composed of a light-emitting diode (LED). It is typically installed on top of a pole to provide illumination on roadways, sidewalks, parking areas, or other exterior spaces. LED street lights are a vital part of infrastructure construction that ensures safety in public and residential areas. For more detailed insights into LED street lights, continue reading below!
Kinds of LED street light
LED street lights can vary according to their heatsink design and LED chip types. Based on the heatsink, there are modular and full die-casting aluminum designs. Modular LED street lights, like the popular ZGSM H series which was developed in 2013, are known for their easy replacement and efficient heat dissipation. On the other hand, lights with all die-casting aluminum designs, such as the ZGSM K series (introduced in 2017) and the Rifle series (launched in 2021), have gained popularity in recent years.
In terms of LED chips, LED street lights can be equipped with either SMD (Surface Mounted Device) or COB (Chip on Board) LEDs. SMD LEDs are more common and are known for their efficiency, reliability, and suitability for street lighting. ZGSM LED street lights primarily use SMD designs for these reasons.
LED road lamps have diverse applications:
- Primary roads, secondary roads, and highways, where enhanced lighting is essential for safety. These roads usually require a lighting class ranging from M1 to M6.
- Pedestrian streets, cycleways, emergency lanes, and residential roads typically need P lighting classes (P1 to P6).
- Other exterior spaces like schoolyards, parking areas, urban squares, and industrial exteriors. Specific lighting designs can be provided based on drawings you share with us.
Difference between LED and traditional street light
High efficiency
LED street lights utilize LEDs as their light source, making them up to 80% more energy-efficient than traditional light sources. This eco-friendliness contributes significantly to LED street lamp cost savings.
No toxic elements
LED street lights contain fewer toxic elements. All ZGSM LED street lights are RoHS certified, ensuring their safety and environmental compliance.
Fewer lights needed
Due to their high efficiency, LED street lights require lower wattage to achieve the same level of illumination. Attention to proper light distribution ensures maximal energy savings and efficiency in lighting applications.
Long life span
LED street lights typically have a long service life, with a lumen maintenance lifetime of up to 100,000 hours and a low failure rate for LED drivers, like the Inventronics EUM series which rates over 200,000 hours. This longevity means fewer replacements and resource savings for municipalities.
The common problem of LED street light
Driven by profit and inequitable competition, some LED street light products may encounter issues such as LED driver failure, poor-quality LED chips, inadequate SPD function, low IP/IK ratings, subpar heat dissipation, poor coating, and inefficient light distribution, among others.
For a comprehensive list of common LED street light problems, please read our detailed blog post titled 《What are the common problems of LED street lights?》
The wattage of LED street light
Wattage is a crucial factor for LED street lights. Higher wattage usually means brighter light, but the actual lighting effect on the ground also depends on various factors such as the height of the pole, road width, pole distance, boom length, boom angle, and the distance between the pole and the road.
“Depending on whether they are illuminating a residential neighborhood, major road, or town center, the lamps used in streetlights vary in both size and power consumption (usually between 35 and 250 Watts). It is often believed that the average wattage of a streetlight is around 80 watts.“ Outdoor Lighting Handbook.
To determine the appropriate wattage, you need to use lighting design tools. Besides wattage, lighting distribution plays a major role in achieving desired lighting results. Here are three methods to help select the suitable wattage for your projects:
Quickly choose by checking the wattage of existing lamps
If you are replacing old roadway lights that use high-pressure sodium or metal halide bulbs, a 250W high-pressure sodium light can typically be replaced by a 100 watt LED street light. We recommend using LEDs that account for 25% to 40% of the wattage of existing sodium street lights.
Quickly choose by checking the height of the pole
You can estimate wattage based on pole height and road width:
- 10W: Pole height 2.5m-3m
- 15-20W: Pole height 3m-4.5m
- 20-30W: Pole height 5m-6m (5m for road width 6-8m, 6m for road width 8-10m, 2 lanes)
- 30-50W: Pole height 6m-7m (suitable for road width 7-8m, 2 lanes)
- 50-80W: Pole height 7m-8m (suitable for road width 8-10m, 2-3 lanes)
- 80-100W: Pole height 8m-10m (suitable for road width 8-10m, 2-3 lanes)
- 120W, 150W, 200W: Pole height above 10-12 meters
Wattage as per lighting design
For detailed lighting design, consider the pole height, road width, pole distance, boom length, boom angle, and the distance between the pole and the road. Providing comprehensive information allows for optimal design to meet the required lighting classification, as specified in tender documents or based on EU standards.
An example of appropriate wattage selection:
| Pole height |
Pole distance |
Road width |
Lighting Class |
Wattage |
| 8m |
35m |
6m |
M3 |
70W |
| 8m |
35m |
6m |
M4 |
50W |
| 8m |
35m |
6m |
M5 |
30W |
Note: Assumes 0m boom length and 0-degree boom angle.
Important parameters of LED street light
Wattage
Wattage plays a crucial role in determining LED street light efficiency and cost. Lower wattage often leads to reduced prices and better chances of winning project bids, as wattage and price are integral factors in tender evaluations.
LED driver
The LED driver is essential for realizing the functionality of street lights. For a quick guide, consider the following:
- Class I or Class II? If Class II, opt for Inventronics.
- For timer dimming, Meanwell, Inventronics, or other options are suitable, but Inventronics is preferred for virtual midnight settings.
- Choose drivers based on other functions like dimming, OLC, NTC, or auxiliary output.
LED chips
LED chips significantly impact the quality and performance of LED street lights. ZGSM offers 3030 and 5050 chip options for various needs, ensuring stability and brightness. You can read more about the significance of LED chips in our article on common problems of LED street lights.
Lens/optics
ZGSM LED Streetlights come with a variety of optical light distributions suitable for all applications. The Rifle series, for instance, offers several optics options to ensure optimal light uniformity. Customizable lighting distribution is also available.
CCT
CCT (Correlated Color Temperature) measures the color appearance of LED light. It ranges from 2700K (warm) to 5700K (cool), indicating whether light appears yellow, neutral, or blue.
CRI
CRI (Color Rendering Index) reflects the quality and color fidelity of light. While CRI 70 is standard for LED street lights, CRI 80 is available for enhanced color accuracy, making it ideal for indoor lighting.
How to install LED street lights?
Here's a step-by-step guide to installing ZGSM Rifle series LED street lights:
- Step 1: Open the packaging, remove any protective materials, and take out the lamp.
- Step 2: Fasten the fitter at the desired tilt angle onto the street light with screws.
- Step 3: Loosen the buckle and open the upper cover of the light.
- Step 4: Feed the wire into the light, secure the external power cable with an M16 connector, and ensure correct wire connections (Brown to Line, Blue to Neutral, Yellow/Green to Ground).
- Step 5: Insert the lamp into the pole, fasten the screws with an Allen Wrench, and check that the light operates properly.
Rifle street light installation steps
LED street light price
Price reference of ZGSM 35W or 40W street light
| Model No. |
LED driver |
Wattage |
LED chips |
Weight |
Unit Price |
| ZGSM-LD35KS |
EUM-050S150DG |
40W |
Lumileds 3030 |
5.9KG |
USD93.33 |
| ZGSM-ST17-40S |
EUM-050S150DG |
40W |
Lumileds 3030 |
4.6KG |
USD70.63 |
| ZGSM-ST18-40S |
EUM-050S150DG |
40W |
Lumileds 3030 |
2.0KG |
USD47.14 |
The price composition ratio of the above street light
| Model No. |
LED driver |
LED module |
SPD |
Lamp housing |
Others |
| ZGSM-LD35KS |
USD20.00 |
USD10.00 |
USD6.00 |
USD45.00 |
USD12.33 |
| ZGSM-ST17-40S |
USD20.00 |
USD8.00 |
USD6.00 |
USD30.00 |
USD6.63 |
| ZGSM-ST18-40S |
USD20.00 |
USD5.00 |
USD6.00
|
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