Addressable Neon Flex Pedestrian Bridge — Riyadh | Senfey

Project Overview

Addressable neon flex defined the visual identity of a new 82-metre pedestrian footbridge linking two plots inside Riyadh’s King Abdullah Financial District. Senfey supplied the full lighting package — 28 ribbed arches running the bridge’s full length, each lit with addressable neon flex pixel-mapped to the district’s central lighting management system. A continuous COB handrail wash and four entry pylon treatments complete the package. The bridge had to read as a single coherent light gesture from the highway below at 200 metres, deliver synchronized scene playback across all 28 arches, and survive Riyadh’s summer roof temperatures and seasonal sand exposure.

Project at a glance

• Structure type: 82 m steel pedestrian footbridge, 28 ribbed arches
• Lighting scope: Arch rib pixel mapping + COB handrail wash + entry pylons
• Total run: 562 metres across 3 product types
• IP rating: IP68 — fully outdoor, sand and rain exposed
• Pixel count: ~13,400 individually addressable pixels
• Operating climate: Roof-level peaks of 62 °C in summer

Products Supplied

Project Challenges

1. Summer thermal cycling and UV exposure

The bridge sits fully exposed to direct sun, with structural surface temperatures peaking near 62 °C in July and August. A standard PVC-jacketed neon flex would have yellowed, hardened, and started cracking within a year. The pixel ICs also had to maintain refresh integrity across a 50 °C operating range without dropout.

2. Pixel-perfect synchronization across 28 arches

The bridge’s signature scene is a wave that travels from one end to the other across all 28 arch ribs simultaneously. Any frame lag, IC dropout, or signal skew between arches would have broken the gesture. With ~13,400 pixels distributed across an 82-metre run, signal integrity and refresh consistency were the central technical risk.

3. Sand and water intrusion

Riyadh sees two to three significant sandstorms per year plus occasional driving rain. The neon profile, connectors, and driver enclosures all had to tolerate full IP68 immersion testing — not just an IP67 marketing label — and survive grit ingress at joint points.

4. Cross-batch color consistency at distance

From the highway viewpoint 200 metres away, any color or intensity variation between arches becomes immediately visible — the human eye picks up a 5% delta in saturated colors at that distance. The 336 m of addressable neon flex had to come from a single LED bin to guarantee inter-arch consistency.

5. Single-container logistics and labelling

The contractor needed everything in one container, segment-labelled by arch number, to keep the install crew moving sequentially without sorting on site. A mis-shipped or unlabelled segment would have idled the entire night shift.

Product Highlights

1. WS2814 4-wire IC — break-point continuous operation

SF-NEON-DMX-WS2814 uses the WS2814 4-wire protocol, which keeps the strip running even when an individual IC fails — a critical reliability feature for a public-infrastructure installation where access to replace a single LED is non-trivial. The wave scene survives single-pixel failures invisibly. See the full addressable LED strip range for protocol options.

2. UV-stable IP68 silicone jacket

The neon flex uses a UV-stabilized silicone outer jacket validated to 3,000 hours of QUV-A accelerated weathering with no measurable yellowing or hardening. Fully IP68 to 1 metre immersion — qualified for sand intrusion under particle-flux testing, not just water spray.

3. Single-bin sourcing across 336 metres

All 336 metres of addressable neon were committed from one LED bin in one production run, holding the dominant wavelength tight enough that the 28 arches read as identical color at any viewing distance — measured and validated on-site under both daylight and night-time conditions before sign-off.

4. Art-Net distribution with fibre uplink

The four SF-CTRL-ART-SPI-1024 controllers connect to the district’s central lighting management system via fibre, with built-in failover. Scene refresh runs at 40 Hz across all 13,400 pixels with no measurable inter-arch lag.

5. IP67 outdoor power adapters, wide-input

The 22 outdoor drivers accept 100–277 VAC input, allowing flexibility in tapping into the bridge’s existing 220 V distribution without dedicated transformers. All driver enclosures sit inside concealed service hatches at handrail base level. Full LED accessories and power supply range available.

Result

Fabrication and pre-assembly closed in seven weeks. The shipping container arrived in Riyadh fully labelled by arch number, and on-site install was staged across nine night shifts:

• Nights 1–2: Driver enclosures, cable trays, and Art-Net backbone
• Nights 3–6: Arch rib neon installation, sequential by arch number
• Night 7: Handrail COB wash and entry pylon vertical accents
• Nights 8–9: Pixel mapping, scene programming, central system integration

The bridge opened to the public in late November and has been running its programmed scene calendar nightly since. Through Riyadh’s summer peak and two seasonal sandstorms, the system has logged zero pixel failures, zero driver swap-outs, and zero color drift at the eight-month inspection. The contractor has since briefed Senfey on two additional pedestrian links scheduled for the next KAFD expansion phase. For a comparable outdoor architectural reference in the same climate region,you can browse more outdoor lighting projects. The Riyadh KAFD project remains one of Senfey’s flagship outdoor addressable neon flex references in the GCC region.