Signalling & warning lights (Stack/Tower Lights)
Signalling & warning lights (Stack/Tower Lights)
Signal and warning lights, often called stack lights or light towers, are used in industrial environments to provide clear visual signalling of machine status, process progress or safety warnings. They often combine several coloured LED modules that can be individually lit to indicate different conditions, for example:
- Green: Normal operation
- Amber: Warning or preparation for action
- Red: Error or critical condition
Modern light towers can also have audio signalling (buzzer or voice messages) and can be controlled via LAN, USB, wireless or IO-Link, making them flexible for both automated production lines and manual workstations.
Areas of use
Signalling and warning lights improve the safety, efficiency and responsiveness of operators and maintenance staff. They are used in areas such as:
- Manufacturing industry and automated production lines
- Logistics and warehouse management
- Building and construction environments
- Energy and process industries
Why use signalling and warning lights?
- Visual status information: Provides a quick overview of the status of machines and processes.
- Improved security: Reduces the risk of accidents by clearly signalling dangerous situations.
- Rapid problem solving: Operators can act immediately when alarms or alerts are triggered.
- Flexibility and customisation: Modern light towers can be programmed for different colours, flash patterns and sound levels.
Patlite Series LR5 Light Tower
Compact LED light tower with light and sound signal for clear status and warning indication in industrial environments.
- Brightness: Ultra bright LED, evenly distributed
- Sound signal: 80-85 dB, 4 sound types
- Mounting: Twist & Lock, 4 options
- IP rating: IP65 / NEMA 4X, 13
- Colour: Off-white, silver, black
- Operation: -20°C to +50°C, max 90 % RH
PATLITE SERIES LA6 LIGHT TOWER
Programmable LED light tower that replaces traditional stack lights and provides flexible signalling.
- LED colours: 21 possible module colours
- Sound: 11 alarm sounds, multiple display modes
- Assembly: 3 or 5 stackable LED floors
- Rated voltage: 24V DC / 100-240V AC
- Pillar colour: Off-white, silver
- IP class: IP65, IP54 (with alarm)
PATLITE SERIES NHV LIGHT TOWER
Compact networked LED light tower with audible signal for efficient monitoring in the workplace.
- Dimensions: Ø 40-60 mm
- Rated voltage: 24 V DC
- Mounting: Several options for mounting
- LED colours: Up to 21 colours for programmable visual signalling
- Alarm: Integrated audible signal
- IP class: IP65
PATLITE EDLR LIGHT TOWER
Explosion-proof LED light tower with audible signal, adapted for hazardous environments with clear status indication.
- Operating temperature: -20 °C - +50 °C
- Humidity: < 90 % (no condensation)
- Installation: Indoor and outdoor, upright position
- IP class: IP66
- Flashing rate: 60 ± 2 flashes/min
- Approvals: IECEx, ATEX
Frequently asked questions (FAQ)
What is the difference between stack lights and light towers?
- Stacked lights are often the same as light towers. The term is mainly used for multiple coloured LED modules stacked on top of each other.
Can I combine light and sound?
- Yes, some models have integrated buzzers or voice message modules for auditory signalling.
How is the light tower installed?
- Light towers can be mounted on machines, panels, pipes or via table brackets. Patlite offers twist-and-lock or quick-mount solutions.
What colours and features are available?
- Common colours: red, yellow, green, blue, white.
Features can include flashing, pulsing, steady-on, combined sound, programmable colour sequences and network control.
What does “networked signalling horn” mean?
- This means that the device not only provides traditional visual and audible signalling, but can also connect directly to networks, control systems and cloud services. It can monitor other networked devices, react to events, report via email and play customised voice messages