Corrosion-resistant solution for your standard tunnel lighting needs


In tunnels, creating optimal driving conditions is essential, especially where environments are challenging. Exhaust gases, heavy rain and snow or even frost can all affect road conditions. Relying on a safe lighting installation that can withstand the most extreme situations is a priority for tunnel managers and engineers.
With this in mind, we have developed TFLEX STS BASE, a high-grade stainless steel luminaire designed for standard lighting needs with high performance and low energy consumption, in the harshest environments. Equipped with improved tunnel optics, it delivers unrivalled uniformity and visual comfort in the most stringent tunnel conditions.
More than a robust tunnel luminaire, TFLEX STS BASE is a smart lighting solution equipped with the latest remote control technologies, to provide the best and safest tunnel driving experience.

Your partner for base tunnel needs

TFLEX STS BASE has been designed to deliver standard tunnel lighting needs with the best performance and visibility inside various zones of the tunnel (entrance, interior and exit). In combination with improved tunnel optics, TFLEX STS BASE ensures optimised lighting levels on road and wall surfaces while providing high visual comfort and uniformity.

Designed to work in extreme conditions

Don’t let weather hazards impact your mobility. TFLEX STS BASE provides a highly corrosion-resistant luminaire, developed to work perfectly in tunnels with extreme conditions. Its ingenious heat sink concept ensures optimum heat dissipation. This concept not only improves the longevity of the installation, it also maintains photometric performance of the device over time.

Connected to your tunnel environment

Integrating the latest remote control technologies, TFLEX STS BASE stays connected to your tunnel environment to help you increase your reactivity to any unexpected events. It allows an accurate response to any sudden change inside and outside the tunnel. With precise dimming, switching and installation monitoring, TFLEX STS BASE helps you improve safety in your tunnels.

An on-site time saver

TFLEX STS BASE uses pre-assembled CPR-compliant cables and connectors to drastically ease and reduce mounting time. Access for maintenance activities is completely tool-free for maximised time savings.

Connected lighting solution for safer tunnels

Tunnels are enclosed environments where safety is the first priority. Nothing should be left to chance. That’s why TFLEX STS BASE is equipped with control technologies compatible with the Advanced Tunnel System 4 (ATS 4 and ATS 4 DALI). The ATS 4 is a powerful control system enabling precise remote dimming and switching of each connected luminaire, based on various tunnel parameter inputs. No matter how variable the tunnel conditions might be, this control system enables TFLEX STS BASE to provide a quick response and adapt the lighting to any sudden event. Connected to the ATS 4, TFLEX STS BASE maximises tunnel safety and enhances the driving experience.

Focus on robustness and performance

TFLEX STS BASE is part of the TFLEX stainless steel concept, a range of luminaires optimised for tunnels with extreme conditions such as highly corrosive environments or harsh weather hazards. The high grades of corrosion-resistant stainless steel result in luminaires perfectly suited to working in harsh atmospheres. TFLEX STS luminaires are equipped with optics optimised to provide the best uniformity and visual comfort when lighting any kind of tunnel environment.


General Information

Recommanded installation height (m)
3.0 - 

Electrical information

Electrical class
Surge protection (kV)
Control protocol(s)
Control option(s)


Luminaire output flux (lm)
3100 - 
Power consumption (W)
22.9 - 
Luminaire efficacy - up to (lm/W)

Optical information

LED colour temperature
Colour rendering index (CRI)

Housing and finish

Stainless steel (AISI 316L / 1.4404)
Tempered glass
Tightness level
Impact resistance
Access for maintenance


Lifetime may be different according to the size/configurations. Please consult us.

Operating conditions

Operating temperature range (Ta)
-30°C up to +55°C / -22°F up to 131°F with wind effect
Depending on the luminaire configuration. For more details, please contact us.

Dimensions and mounting

AxBxC (mm | inch)
444x118x435 | 17.5x4.6x17.1
Weight (kg | lbs)
10.0 | 22.0
Mounting possibilities
Surface mounting

Control systems

TFLEX STS BASE control options

TFLEX STS BASE has the following dimming/control options:
• Remote management based on an industrial communication BUS
• DALI or 1-10V network protocols

TFLEX STS BASE is compatible with the Advanced Tunnel System 4 (ATS 4 and ATS 4 DALI), a smart tunnel control solution co-developed by Schréder and Phoenix Contact.

Installation and Maintenance

Ceiling and wall mounting

The fixed brackets allow standard mounting on flat surfaces, be it on walls or ceilings. The brackets are ANSI 3G vibration validated.

Easy access

Access to TFLEX STS BASE is tool-free, using a latch. The electrical connection is achieved via pre-assembled CPR-compliant cables and toolless connectors, to drastically reduce installation time and avoid any wiring issues.