Portable Light Towers for Emergency Response: How to Choose Power, Height and Output

At a road crash, a flood, a collapsed structure or a night-time plant emergency, the first job is to light the whole scene and keep it lit. The right light tower depends on how fast it must be set up, how long it must run, how much area it must cover and whether the scene is a hazardous area. This guide walks through each decision.

How much light do you need?

Light on a work area is measured in lux (lumens per square metre) or foot-candles (1 fc ≈ 10.76 lux). For construction and similar work the US OSHA standard 29 CFR 1926.56 sets these minimums:

Emergency scenes often need more than these minimums at the point of work (casualty care, cutting, scene examination), with lower levels on approaches. Plan in two layers: area light from a mast, and task light from hand lights and headlamps.

Power source: battery, generator or mains

Most fire and rescue fleets carry battery lights for the first hour and bring generator towers for long incidents.

Mast height and coverage

A higher light covers a larger area more evenly and throws shadows inward instead of across the scene. It also reduces glare in rescuers' eyes. As a rough guide:

• 2–2.6 m: one-person tripod and case lights for a vehicle, a doorway or a small work area. Examples: HZ6125 (2.2 m), HZ6123 (2.6 m).
• 3–4.5 m: scene lighting for a road crash, a building front or a section of track. Examples: HZ6129 (3.8 m), HZ6133 (4.5 m).
• 5–7 m and above: large incidents, flood zones, rail and construction sites. Examples: HZ6132 (3 or 5 m), GAD506 (4.5 or 6 m), HZ6180 (7.1 m).

Heads that aim independently let one mast light all around (360°) or flood one side only. That matters at roadside scenes, where light must not dazzle oncoming drivers.

Output: watts, lumens and lux at distance

Lumens describe the total light; lux at a stated distance describes what lands on the work. Compare towers by lux at 10 m or 20 m where the manufacturer gives it. In our range, for example:

LED or metal halide?

Some towers still offer metal halide or halogen lamps. LED is now the default for emergency use:

• Instant on and instant restrike. Metal halide lamps take minutes to warm up and longer to restart when hot.
• Lower power for the same light, so longer battery runtime or less fuel.
• Shock resistance when masts are moved or vehicles drive over rough ground.
• Long life: the LED heads on our panoramic systems are rated for 100,000 hours.

Metal halide still appears on large towers such as the GAD506, where some customers prefer it for very large areas.

Runtime and battery planning

For battery lights, plan runtime per mode against the length of a typical incident. The HZ6129 runs about 7 hours with all heads on and 13 hours on spot or flood alone; the HZ6125 runs 5, 10 or 14 hours depending on brightness. Rotate units or carry a charged spare for longer scenes, and charge at the station or in the vehicle rather than at the scene.

Set-up and transport

• One-person set-up: tripod systems around 8–12 kg can be carried by hand or on the back.
• Vehicle stowage: folded lengths from about 1 m (HZ6125, HZ6129) to cased units such as the HZ6116 (495 mm).
• Large towers: wheeled (HZ6133 with 10-inch wheels), trailer-mounted, or self-loading on hydraulic legs (HZ6180, 650 kg).
• Control: remote controls and Bluetooth apps let the operator dim or aim lights without climbing to the head.

Warning lights and public address

At roadside and public scenes the light tower also protects the scene. Look for built-in red-blue or amber warning lights (HZ6129, HZ6116) and, for crowd or evacuation situations, a PA speaker (the HZ6119 has 30W).

Lighting inside hazardous areas

At refinery fires, gas leaks, tanker incidents and plant turnarounds, the scene may be a classified area. Generator towers cannot go inside it. Use Ex-certified battery area lights inside the zone and generator towers outside it. The HZ6129 and HZ6125 are Ex eb ib mb IIC T6 Gb, suitable for Zone 1 and Zone 2. See Zone 0, 1 and 2 explained.

Three typical scene layouts

Road traffic collision at night

One 3–4 m tripod light behind the vehicles, aimed one-sided onto the casualty area so oncoming drivers are not dazzled, with its red-blue warning lights facing traffic. Headlamps for the cutting crew. A case light at the casualty handover point.

Building fire or collapse

Two or three tripod or wheeled towers at the corners of the building front, lighting the walls and access routes in 360° mode. A mains or generator tower for the command post and casualty clearing station if the incident runs for hours.

Plant or refinery incident

Ex-certified battery area lights (HZ6125 or HZ6129) inside the classified area around the leak or fire, generator towers lighting the approach roads and staging area outside it, and Ex headlamps and searchlights for every responder entering the zone.

Buying checklist

1. Typical scene size and duration
2. Required lux at the point of work and on approaches
3. Power source: battery for first response, generator or mains for long duration
4. Mast height and 360° or one-sided lighting
5. Hazardous-area use: Ex marking required?
6. Weight, stowed size and number of people to set up
7. Warning lights, PA, remote or app control
8. Charging and refuelling plan

Send your requirements through the quote form and we will suggest a mix of units.

Frequently asked questions

Further reading

• OSHA 29 CFR 1926.56: Illumination
• IECEx: International Electrotechnical Commission System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres