Construction Site Lighting Tower: What to Specify Before Ordering

A construction site lighting tower is not a commodity purchase. Two sites with identical footprints can need completely different machines — one needs a compact unit that fits through a residential gate and runs unattended until sunrise; another needs a tall mast, a wide stance, and a power source that survives a week of overcast weather. The difference is not brand or budget. It is specification.

Most ordering mistakes happen before the first email to a supplier. A buyer compares datasheets, sees two numbers that look similar, and assumes the machines are equivalent. Then the unit arrives and the problems surface: the trailer will not fit the access route, the mast will not clear the containers, or the batteries are flat by 2 a.m. because nobody separated "solar panel watts" from "light watts."

This guide walks through the specification decisions that actually determine whether a lighting tower works on your site. It covers how to read a spec sheet, what to survey before ordering, and which questions to put to any supplier — including us. Along the way, we use one published BIGLUX configuration as a worked example of how a real datasheet reads. It is an example, not a recommendation. Your site decides what is right.

Separate PV Input Power From Lighting Load

The single most common specification error is treating a lighting tower's headline wattage as if it described one thing. It almost always describes two.

PV input power is what charges the battery. On a solar lighting tower, this is the array of photovoltaic panels — for example, "3 × 190W monocrystalline" describes three panels totaling 570W of charging capacity under standard test conditions. This number tells you nothing about how bright the site will be. It tells you how quickly the battery bank can be replenished.

Lighting power is what consumes energy. This is the load: the LED heads, their wattage, and their output in lumens. A tower with four 100W LED heads draws up to 400W when all heads run at full intensity. That is the number that drains the battery overnight.

Battery capacity is the reservoir between the two. It is typically expressed in amp-hours at a nominal voltage — for example, "4 × 200Ah gel batteries DC12V." This is the stored energy available to the lights when the panels are not producing.

Reading these three together — array, load, and storage — is the only honest way to compare lighting towers. A large array with a small battery still runs out of energy before dawn. A large battery with a small array takes too long to recover after a long night. And a large load with either one will drain the system faster than the datasheet headline suggests.

A specification note: the relationship between these numbers, the site's latitude, the season, and the weather is what determines real autonomy. This article does not estimate runtime for any configuration; ask what the numbers mean for your specific site and shift pattern during enquiry.

Why Autonomy Is a Site Question, Not a Datasheet Number

Autonomy — how long a tower can run without recharging — is often quoted as a single figure. In practice it is a range that depends on five variables:

The load actually used. Running two LED heads instead of four changes everything.
The duty cycle. Lights held at reduced output draw less than lights at full output, if the fixture supports dimming or programmed schedules.
Available sunlight. Winter at high latitude produces far less charging energy than summer near the equator.
Panel orientation and shading. A tower parked under a crane or beside a site office wall may never see direct sun.
Battery condition and temperature. Gel and lithium banks behave differently in cold weather, and capacity declines with age and cycling.

This is why we do not estimate runtime for any configuration in this article, and why you should treat any supplier who promises "runs all night, every night, everywhere" with caution. The right conversation is not "how many hours?" but "given my site, my season, and my shift pattern, what does the energy balance look like — and what happens on the worst week of the year?"

Working Hours and Shift Patterns

Before comparing hardware, define how the tower will actually be used.

Single day shift with occasional night work. The tower charges all day and lights occasionally. The main specification questions are deployment speed and transport.

Every-night operation, dusk to dawn. This is the demanding case. The tower must recover a full night's consumption during daylight, which means the array, battery, and load must be balanced for the site's worst realistic solar conditions — not its best. If the site has grid power available, a hybrid or grid-assisted approach may be more appropriate than pure solar. If it does not, the load must be managed: fewer heads, lower output, or programmed schedules.

Multi-shift or around-the-clock operations. Continuous lighting is a different category of problem. At that point the conversation moves toward mobile energy storage and hybrid power rather than a standalone solar light tower. Buyers in this situation should be explicit with suppliers about the duty cycle from the start.

Intermittent use — task lighting during specific operations. Short, high-intensity bursts change the battery math entirely, and may favor a different balance of storage versus array.

Write down your honest usage pattern before you order. A supplier who understands the pattern can help you choose among configurations. A supplier who only hears "construction site" will guess.

Transport: Trailer Dimensions, Weight, and Hitch

A lighting tower spends more time being moved than most buyers expect. Transport constraints eliminate more products from consideration than performance constraints do.

Dimensions. Trailer footprint and mast height in the stowed position determine whether the unit fits on your transport and through your access routes. A published BIGLUX example lists 1520 × 3475 × 2730 mm — width × length × height, as listed. Compare those numbers against the narrowest gate, the lowest overhead obstruction, and the deck space on the truck or trailer you intend to use.

Weight. The same example lists 920 kg. That matters for three reasons: whether a standard passenger vehicle can tow it, whether a site crane or forklift is needed to reposition it, and whether the ground under its wheels can support it when parked.

Hitch type. The example uses a 50 mm ball hitch — a common standard in many markets, but not universal. Confirm the hitch matches your towing vehicle before the unit ships. Adapter availability varies by region, and a mismatch can strand a delivery.

Axle and braking. Single-axle trailers are compact and maneuverable; tandem axles carry more and tow more stably at speed. Braking requirements depend on local road regulations and the tow vehicle. Confirm what your jurisdiction requires.

Stowed mast. A telescoping mast must be fully retracted for transport. Confirm the stowed height and the method used to secure the mast during travel.

If the tower cannot reach the site, nothing else on the datasheet matters. Survey the route first.

Deployment: Outriggers, Mast Raising, and Positioning

Deployment is where specifications meet labor. A tower that takes one person ten minutes to set up is a different tool from one that takes two people an hour.

Outriggers. Manual outriggers — as in the published example — require an operator to deploy and level them by hand. They are simple and robust, with no hydraulics to maintain. Powered outriggers reduce physical effort but add complexity. The right choice depends on how often the tower moves and who is available to set it up.

Mast raising. The example configuration uses a 6.5 m manual telescoping mast; confirm the raising mechanism and any operating limits during enquiry.

Stability in wind. A raised mast is a lever, and wind loads it. The published example lists a 100 kph wind rating; confirm what conditions the rating assumes during enquiry.

Positioning. Where the tower sits determines both its effectiveness and its safety. Consider:

Ground bearing capacity — outriggers concentrate load and can sink into soft soil.
Distance from excavations, trenches, and vehicle routes.
Clearance from overhead power lines. This is a hard safety constraint, not a preference.
Glare and light trespass toward neighboring properties, roads, and site accommodation.
Access for refueling, inspection, or battery service, if applicable.

The best practice is to walk the site with the deployment plan in hand before the tower arrives. Mark the intended positions. Confirm the ground. Confirm the route in and out.

Ground Conditions and Site Survey Questions

A short site survey prevents most specification errors. Bring these questions to the site walk:

Ground and access

What is the ground surface — paved, compacted hardcore, gravel, clay, sand, or topsoil?
What is the narrowest point on the access route, and what is the lowest overhead obstruction?
Can a towing vehicle reach the intended position, or will the unit need to be craned or forklifted into place?
Is there a turning circle, or will the unit be reversed in?

Security

Is the site secure overnight, or is theft and vandalism a realistic risk?
If the site is unsecured, does the tower need locking enclosures, wheel clamps, or a tracked location? (For remote or high-risk sites, solar CCTV towers are often deployed alongside lighting.)
Who is responsible for the equipment out of hours?

Lighting positions

Which work areas, walkways, and access points need illumination?
Are there obstructions — scaffolding, containers, stockpiles — that will shadow a tower position?
Are there light-sensitive neighbors or nearby roads where glare matters?
How many towers are needed, and where? One central tower rarely covers a large site evenly.

Operations

Who will deploy and retrieve the tower each day, and are they trained?
What is the maintenance plan — cleaning panels, checking batteries, inspecting masts and outriggers?
What is the seasonal worst case for sunlight at this location?

Answers to these questions turn a generic purchase into a specified one.

Reading a Spec Sheet: A Published 570W Example

Here is how one published BIGLUX configuration reads. Treat it as an illustration of spec-sheet structure, not as a recommendation for your site.

One published configuration — 570W solar light tower:

PV input: 3 × 190W monocrystalline panels (570W total)
Lighting load: 4 × 100W LED heads (4 × 11,000 lm)
Battery: 4 × 200Ah gel batteries, DC12V
Mast: 6.5 m manual telescoping
Dimensions (as listed): 1520 × 3475 × 2730 mm (width × length × height)
Weight: 920 kg
Trailer: single axle, manual outriggers, 50 mm ball hitch
Charge controller: Morningstar MPPT (or other MPPT controller — exact model to be confirmed during enquiry)
Wind rating: 100 kph

Notice what this spec sheet does and does not tell you. It tells you the array size, the load, the storage, the listed dimensions, and the wind rating. It does not tell you how long the tower runs at your site, how bright the ground will be at a given distance, or whether it suits your shift pattern. Those depend on your site and your operation — which is precisely why the specification work is yours to do, with the supplier's help.

The full product page for this configuration is at /products/570w-solar-light-tower/, and a broader range of units is listed on our portable lighting towers category page at /portable-lighting-towers/.

Questions to Ask the Supplier

Any serious supplier should welcome these. Their answers will tell you as much about the company as about the product.

What is the actual load in watts, and can heads be switched or dimmed independently? Load management is the primary runtime lever.
What is the battery chemistry, capacity, and expected cycle life? Gel and lithium have different tradeoffs in cost, weight, temperature behavior, and service life.
What charge controller is used, and is it MPPT? MPPT tracking extracts more energy from the array in real-world conditions.
What are the transport dimensions, weight, and hitch type? Confirm against your access route and towing vehicle.
How is the mast raised, and what wind rating applies at full extension? Ratings are conditional — ask what conditions they assume.
What documentation is provided? BIGLUX states that certificates are available upon request; ask for the specific documents relevant to your market and application.
What spare parts and service support are available in my region? Batteries, controllers, LED heads, and masts are the wear items.
What are the shipping options and their documentation requirements? Buyers typically confirm the shipping method — sea freight via Shenzhen port, air freight via Shenzhen Bao'an or Hong Kong International, or express couriers such as TNT or DHL. Transit times depend on the carrier and destination and should be confirmed per order.

If a supplier cannot answer these clearly, that is useful information too.

Common Specification Mistakes to Avoid

Comparing headline watts across products. A "570W" tower and a "570W" competitor may have entirely different loads, batteries, and therefore real-world behavior. Compare array, load, and storage together.
Assuming the mast will clear everything. Measure the access route in its worst condition, not its nominal one.
Ignoring the towing vehicle. A 50 mm ball hitch is common but not universal. Confirm, do not assume.
Specifying for summer and deploying in winter. Seasonal solar variation is large. Ask about the worst month at your latitude.
Forgetting transport height. A mast that is "nearly" stowed can still clip a bridge or a site gate.
Assuming one tower covers a site. Placement and shadows matter more than raw output.

Closing: Specify Your Site Lighting

A construction site lighting tower performs well when it matches the site. That means starting from the survey — ground, access, shift pattern, security, lighting positions — and only then matching a configuration to the answers.

Define your load. Understand your storage. Measure your route. Plan your deployment. Then read the spec sheet with all of that in hand, and ask suppliers the hard questions. The published 570W configuration above shows how one datasheet reads; your site decides whether it, or something else entirely, is the right machine.

BIGLUX Innovation Ltd has spent more than ten years in the mobile solar industry, manufacturing solar light towers, solar CCTV towers, solar trailers, mobile energy storage, and telescopic masts. Certificates are available upon request.

Specify Your Site Lighting — talk to our team about your site conditions, and we will help you match a configuration to them.

WhatsApp / WeChat: +86 18128807281
Hot line: +86 18818785601
Email: sales@solarlighttowerpro.com
Head office: Building 6, No. 34, Guanghui Rd, Longteng Community, Shiyan Street, Bao'an District, Shenzhen, China
Products: /products/570w-solar-light-tower/ · /portable-lighting-towers/

Specify Your Site Lighting

Construction Site Lighting Tower: What to Specify Before Ordering