Size a solar street lighting layout in seconds: enter your road width, pole arrangement and target brightness, and the calculator returns the recommended pole spacing, the lumens each fixture must deliver, a suggested wattage class and the number of poles for your road length – using the same sizing rules as our engineering guides.
1 · Site Inputs
2 · Results
Formulas: spacing ≈ 3–4 × pole height (single side), 4–5 × (staggered), 3.5–4.5 × (center twin-arm) · required lumens = lux × spacing × width ÷ utilization factor · wattage class assumes ~100 delivered lm/W, a typical figure for quality integrated solar street lights. Estimates for budgeting – request a photometric check for tender submissions.
Get a Layout Check From Our EngineersDeep-dive the sizing method in our wattage, pole height & spacing guide, compare formats in all-in-one vs split solar street lights, or browse the range in our shop.
How the Calculator Works
The tool applies the three planning relationships used in professional road lighting:
- Spacing follows pole height. Single-side layouts start at 3-4 times the mounting height; staggered layouts stretch to 4-5 times because each point on the road is lit from two sides; center twin-arm layouts sit between the two.
- Lumens follow the area each lamp must cover. Required lumens per lamp = target lux × spacing × road width ÷ utilization factor (0.25-0.35 is a realistic planning range for typical street light optics).
- Wattage follows delivered lumens. The suggested class assumes roughly 100 delivered lumens per watt of LED power – a typical figure for quality integrated solar street lights. Always buy lumens, not watts.
Typical Starting Values by Road Type
| Installation scenario | Pole height | Typical wattage | Typical spacing |
|---|---|---|---|
| Garden paths, walkways, narrow lanes (2-3 m wide) | 3-4 m | 20W-30W | 10-15 m |
| Residential streets and community roads (4-6 m) | 5-6 m | 40W-60W | 15-20 m |
| Urban and collector roads (7-9 m) | 7-8 m | 60W-100W | 20-30 m |
| Main roads and wide arteries (10 m and above) | 9-12 m | 100W-200W+ | 30-40 m |
| Parking lots and compounds | 6-8 m | 40W-80W | 20-25 m |
Treat every result as a planning estimate, not a specification: the final layout depends on your tender illuminance requirement, the luminaire optics and the local standard. For tender submissions, ask us for a photometric check based on the actual IES files of the fixtures you are quoting.
Ready to price the layout you just calculated? Qichenshop manufactures all-in-one and split solar street lights from 20W to 200W+ for global distributors, contractors and EPC buyers, with an MOQ from 50 units. Send your road width, pole height and nightly operating hours via our contact page, or browse the full range in our shop.