Insufficient brightness
Low lumen packages leave dark transitions when mounting height, road width or lane count increases.
ST71 Nexus · 300W High-Output Configuration
45,000 Lumens for Large-Scale Roadway Applications
ST71 Nexus 300W delivers powerful, efficient and reliable illumination for highways, industrial roads, ports and large outdoor areas.
Engineered for project teams that need more usable light from high mounting positions—not a conventional city-street solution.
300WNominal power
≈45,000 lmSystem output
150 lm/W300W efficacy
IP66 · IK09Outdoor protection
±15°Adjustable mounting
The scale problem
Why ordinary street luminaires struggle on large sites
Lower-output luminaires can work well on local roads. Stretching them across high poles, wide carriageways and long truck routes changes the project economics.
Too many poles
Shorter spacing may be needed to recover coverage, multiplying foundations, cabling and controls.
Higher installed cost
Every additional point adds civil work, electrical infrastructure, commissioning and project coordination.
Difficult maintenance
More assets and high mounting positions increase inspection time, access-equipment demand and disruption.
Application-led selection
Built around the road, not the product category
ST71 300W is most relevant where long operating hours, high mounting positions and broad roadway geometry demand a larger lumen package.
Application 01
Highway & Expressway Lighting
High-output roadway optics support design studies for long, multi-lane corridors and complex decision zones.
- Typical study range: 12–15 m poles
- Preliminary spacing study: 40–60 m
- Multi-lane carriageways and median layouts
- Interchanges, ramps and merge areas
- Toll stations and approach roads
Application 02
Port & Container Yard Roads
Broad truck routes, long operating hours and exposed maritime conditions require durable, controlled roadway illumination.
For coastal projects, confirm the required corrosion category and coating specification against the exact project environment.
Application 03
Industrial Park & Logistics Hub
Maintain clear routes between factories, loading areas and distribution buildings without treating the site like a residential street.
- Factory perimeter and internal roads
- Warehouse access roads
- Heavy-truck circulation routes
Application 04
Airport & Large Parking Areas
Use a high-output roadway platform to study vehicle circulation and large parking zones around transport infrastructure.
- Passenger parking
- Cargo and fleet parking
- Transportation-hub access roads
Power with a purpose
Where 300W Makes Sense
Power is a starting point—not a substitute for photometric design. Use this table to screen applications before detailed simulation.
| Application | Recommended Power | ST71 300W Advantage |
|---|---|---|
| City road | 80–150W | Too large |
| Main road | 150–200W | Higher safety margin |
| Highway | 250–300W | Ideal |
| Port | 250–400W | Ideal |
| Industrial area | 200–300W | Ideal |
Configuration clarity
Specify the exact variant your project requires
ST71 is a broad product family. The high-output 300W model and the highest-efficacy connected variants are different configurations.
300W focus
High-output roadway
- Approximately 45,000 lm
- 150 lm/W at 4000K, Ra70
- Optional 3-pin NEMA photocell interface
- Side-entry or post-top, ±15° adjustment
ST71 family options
Efficiency & connectivity
- Up to 190 lm/W on variants up to 200W
- D4i with dual Zhaga interfaces up to 200W
- Multiple optical distributions
- Project-specific control selection
From wattage to a working layout
Start with geometry. Finish with photometrics.
A representative highway study can begin with 12–15 m poles, 40–60 m spacing and an illustrative 20–30 lx target. Optics, overhang, tilt and road class determine whether the layout works.
12–15 mPole height
40–60 mPole spacing
14–28 mStudy width
20–30 lxExample target
Illustrative design inputs only. Final average/minimum values, uniformity, glare and luminance must be verified in DIALux, Relux or equivalent software using the selected IES/LDT file and the applicable local standard.
Project-screening ROI
A practical case for replacing 1000W HID/HPS
Where a photometric study confirms equivalence, moving from a nominal 1000W legacy source to a 300W LED system can materially reduce operating energy and maintenance exposure.
This is not a guaranteed one-for-one replacement claim. Existing ballast losses, pole layout, optics, maintained light levels and local requirements must be assessed.
70%Nominal input reduction
700WLess connected load
2,800 kWhSaved per light / 4,000 h
Lower energy demand reduces annual consumption and upstream electrical load.
Less routine relamping reduces lift access, traffic control and service interruptions.
Tool-free access simplifies planned inspection and internal component service.
Bring us the road geometry
Turn 45,000 lumens into a verified project layout.
Share pole positions, mounting height, road width, target standard and operating profile. AGC can support optic selection and lighting simulation.