Choosing the right LED street light wattage — from 50W on a quiet country lane to 300W on a six-lane arterial — is the single most important decision in any roadway lighting project. Get it wrong and you either pay for dark, unsafe stretches of road or burn electricity on light nobody needs. This guide walks you through street light wattage selection road class by road class, helps you settle the perennial 100W vs 150W street light question, and explains the color temperature and beam optics that turn a good fixture into a great installation.
Looking for the right lighting solution? Explore our LED Street Lights Moon A Series or see our Street & Roadway LED Lighting projects.
Why LED Street Light Wattage Matters
In the LED era, wattage is really a proxy for light output. A modern LED street light delivers 140–180 lumens per watt, so a 100W fixture produces roughly 14,000–18,000 lumens — enough to replace an old 250W high-pressure sodium lamp while cutting energy use by more than half. That conversion is the starting point of any street light wattage selection:
| Old HPS Lamp | Equivalent LED Street Light | Typical Output |
|---|---|---|
| 150W HPS | 50–60W LED | 7,500–10,000 lm |
| 250W HPS | 100–120W LED | 14,000–18,000 lm |
| 400W HPS | 150–200W LED | 21,000–30,000 lm |
But watts alone do not illuminate a road. Lumen output, optical distribution, mounting height and pole spacing all work together — which is why a photometric design, such as the free Dialux study Worldhand provides with every quote, is the right way to confirm any wattage choice.
LED Street Light Wattage by Road Class
The table below gives practical starting points for common road categories. Use them as a baseline, then refine with a photometric calculation for your exact carriageway width, pole layout and local standard (EN 13201, IES RP-8 or your national code).
| Road Class | Recommended Wattage | Mounting Height | Typical Spacing |
|---|---|---|---|
| Arterial / main road | 200–300W | 10–12m | 30–40m |
| Collector / secondary road | 100–150W | 8–10m | 25–35m |
| Residential / local street | 50–80W | 5–7m | 20–30m |
| Rural / country road | 50–60W | 6–8m | 30–40m |
Notice how wattage tracks road width and traffic speed: fast, wide roads need more lumens and higher mounting so light spreads evenly without glare.
100W vs 150W Street Light: How to Decide
The 100W vs 150W street light comparison is the most common specification dilemma for two-lane and light arterial roads. A 100W LED street light (around 15,000 lm) suits a two-lane collector with 8–9m poles spaced 30–35m apart. A 150W LED street light (around 21,000 lm) fits wider carriageways, 10m poles, or layouts where uniformity targets force wider spacing. Ask four questions:
- How wide is the carriageway? Above 10m, lean toward 150W.
- What is the mounting height? Higher poles spread light further and often push you up a wattage class.
- Is spacing fixed by existing infrastructure? Wider spacing needs more lumens.
- Do local standards demand higher illuminance or uniformity (for example U0 ≥ 0.4)?
When in doubt, choosing 100W and 150W versions of the same optical platform — like Worldhand’s GL series and Moon series — makes it easy to test both in a Dialux simulation before you buy.
3000K vs 5000K: Choosing Color Temperature
Correlated color temperature shapes how a road looks at night and how neighbors perceive the installation:
| Option | Best For | Considerations |
|---|---|---|
| 3000K warm white | Residential streets, historic areas, dark-sky-sensitive zones | Less blue light, softer on the eye, lower sky-glow contribution |
| 4000K neutral white | Mixed urban roads | Balanced visibility and comfort |
| 5000K cool white | Arterials, industrial zones, security lighting | Highest perceived brightness, better CCTV color rendering, more blue-light emission |
Many municipalities now cap street lighting at 3000K or 4000K for dark-sky compliance, so check local policy before specifying 5000K.
Match the Optics: Type II, III and IV Distribution
Wattage delivers the light; the optic aims it. IESNA classification is a core part of serious street light wattage selection:
- Type II — a narrow, elongated pattern for two-lane roads and bike paths where poles sit close to the carriageway edge.
- Type III — the workhorse for standard two-to-four-lane roads mounted at the side; spreads light across the full roadway width.
- Type IV — a wide, forward-spreading pattern for intersections, parking areas and wide plazas.
Specifying the right distribution can let a 100W fixture outperform a poorly aimed 150W one — optics are where the real efficiency lives.
FAQ
What LED street light wattage replaces a 250W high-pressure sodium lamp?
A 100W to 120W LED street light typically delivers equal or better photometric performance while using less than half the energy.
Should I choose a 100W or 150W street light for a two-lane road?
Start with 100W for a standard two-lane collector at 8–9m mounting. Step up to 150W when the carriageway is wider than about 10m, spacing exceeds 35m, or your standard requires higher uniformity.
Does higher wattage always mean a brighter road?
No. Lumen output and optical distribution matter more than the wattage number itself; a well-aimed Type II 100W fixture can outperform a mis-specified 150W one.
Is 3000K or 5000K better for street lighting?
3000K suits residential and dark-sky-sensitive areas; 5000K suits arterials and security zones. Many municipalities now restrict cool white, so confirm local policy first.
Get a Free Dialux Design for Your Street Lighting Project
Worldhand Technology Co., Ltd. has manufactured LED lighting since 2010 and holds CE, LVD, EMC, TM-21, LM-79 and ISO 9001 certification, with a 5-year warranty on every fixture. Our GL series and Moon series LED street lights cover every wattage from 50W to 300W with Type II, III and IV optics and 3000K–5000K options. Send us your road width, pole layout and target standard, and our engineers will deliver a free Dialux design with recommended wattage, spacing and lux maps — no obligation. Contact Worldhand at info@worldhandlux.com, call +86-512-50108790, or message us on WhatsApp at +86-189-126-83525.
Related Articles
Need help with your project? Contact Worldhand for a free Dialux lighting design and quotation — email info@worldhandlux.com, call +86-512-50108790, or WhatsApp +86-189-126-83525.
Related LED Lighting Solutions
Looking for professional LED lighting for your project? Explore our LED Street Lights Moon A Series or visit our Street & Roadway LED Lighting Solutions page to see how Worldhand can help. Contact us for a free Dialux lighting design.
