Tunnel and underpass lighting
Discover our tunnel luminaire products, made of high-quality components specifically dedicated to lighting tunnels and underpasses, ensuring a long product lifetime, excellent performance and low maintenance costs.
FAQs
The range on this page covers nine families: TubePoint gen2, TubePoint gen3, TubeLine, FlowBase G2, FlowStar Gen2, FlowPad, FlowMax, LineBase, and TunLite LED GEN2. Each family is engineered specifically for the photometric and mechanical demands of tunnel and underpass installations, including thermal management, vibration resistance, and maintained luminance across long service intervals.
Families on this page span 60 W to 240 W, giving specifiers the flexibility to address both short urban underpasses at the lower end and long motorway tunnels requiring high maintained illuminance at the upper end. Each family's datasheet provides the full photometric breakdown needed for CIE 88 tunnel lighting calculations.
Across the families on this page, efficacy reaches up to 145 lm/W. where relamping and maintenance access involves traffic management and significant safety overhead. Long lifetime directly reduces the total cost of ownership over the installation's service life.
IP ratings available on this page include IP54, IP65, IP66, and IP67, with IP67 suited to the highest moisture-exposure zones such as wash-down areas at tunnel portals. IK ratings span IK02 through IK10, with IK09 and IK10 variants appropriate for locations exposed to mechanical impact from vehicles, maintenance equipment, or cleaning operations.
Dimmable variants are available across the range. In tunnel lighting, DALI is routinely used as a driver-programming interface — enabling engineers to set adaptive dimming curves (threshold zone, transition zone, interior zone luminance levels) without requiring access to the luminaire housing. Network-level management of a tunnel lighting system is typically handled via Interact City / Interact Roadway, which provides remote monitoring, dimming schedule management, and fault reporting across the full installation.
CCT options across the families span 2,700 K to 6,500 K. For tunnel interiors, cooler CCTs (typically 4,000 K or above) are commonly specified to support visual acuity at driving speeds, where the ability to detect hazards quickly is the primary design criterion. The appropriate CCT for a given installation should be validated through a photometric calculation aligned with CIE 88 tunnel lighting guidance.
CRI ranges from 70 to 80 across the families on this page. For road tunnel applications, CRI 70 is widely accepted because the primary requirement is luminance uniformity and adaptation-zone management rather than colour-discrimination tasks. Where tunnels incorporate service areas, emergency refuges, or signage that benefits from better colour rendering, CRI 80 variants are available.
Product datasheets, IES/LDT photometric files, and technical documentation for each family — TubePoint gen2, TubePoint gen3, TubeLine, FlowBase G2, FlowStar Gen2, FlowPad, FlowMax, LineBase, and TunLite LED GEN2 — are available directly from each family's product page on signify.com. These files can be imported into photometric calculation software for CIE 88-compliant tunnel lighting design.
This is Signify's global product page. Country-specific regulations — such as the EU EcoDesign Directive, IEC 60598-1 (general luminaire safety), and local road-infrastructure and tunnel safety codes — vary by market and are not covered on this page. For regulatory and compliance information specific to your installation country, visit Signify's website for your country via the country selector, where the corresponding category page lists locally compliant variants and applicable standards.