MTLx family · clearNET · 2026 edition

Mass Transit & Infrastructure LED Lighting

One fixture family for every mode of tunnel illumination — NFPA 130 egress at 6 W, OSHA work light at 60 W, integral battery ride-through, and a 900 MHz self-healing mesh that has run in NYC revenue service since 2018. Made in Central Islip, NY. BABA compliant.

Explore the platform MTLx family brochure (PDF) Start a pilot
6W
Standard Mode · NFPA 130
60W
Work Mode · OSHA 1926
IP66/ IK10
Sealed · impact rated
15+ yr
MTLx Pro design life
5,000+
clearNET fixtures deployed
BABA / BAA compliant Made in Central Islip, NY NYCT spec 16ES wireless Intertek LM-79 photometry
Market Overview

Lighting Engineered for Underground Infrastructure

Subway tunnels, rail corridors, and underground stations punish lighting like nowhere else — water infiltration, brake dust, constant vibration, salt, DC-traction EMI and 24/7 operation. Standard commercial fixtures fail in months. The MTLx platform was engineered for this environment from the extrusion out, and it has been running in NYC Transit tunnels since 2018.

Modern tunnel interior with continuous LED lighting along both sides

Water, dust & impact

IP66 dust-tight and water-jet rated. IK10 impact rating. 0.125" extruded-aluminium housing with tamperproof stainless T15 centre-pin-reject hardware.

Constant rail vibration

Quick-connect bracket on the retrofit bolt pattern, captive hardware, keyed light-engine seat — nothing to loosen across decades of pass-bys.

Driver-limited lifetimes

The driver runs at roughly one third of rated load with a 6 °C case rise. On MTLx Pro the LED engine is hand-removable, so the asset is serviced in minutes — not replaced.

Emergency egress

Optional integral NiMH battery — 1, 2 or 4 hours of ride-through on the same downlight, self-diagnosing over clearNET. No separate emergency circuit, junction box or generator feed.

Network-scale monitoring

clearNET 900 MHz self-healing mesh rides on the fixture itself — no trackside cabling, no agency IT project, and no overlap with the 2.4 GHz CBTC band.

Specification confidence

Four engineering whitepapers, Intertek LM-79 photometry, IES files on request, and a published Mass Transit op-ed — the evidence base agencies cite in their specs.

01 · The platform

One fixture family for every mode of tunnel illumination.

MTLx is a single extruded-aluminium platform that carries Standard Mode and Work Mode, an optional integral NiMH battery for emergency ride-through, and the clearNET wireless mesh — in one housing, on one mounting bracket, with one part-number system. Tap a marker to see what each part does.

MTLx Pro exploded view from CAD TL4064-29: uplight lens and LED board, extruded aluminium housing, removable LED light engine, clearNET wireless end-can, internal driver, NiMH battery pack and aluminium mounting bracket
MTLx Pro exploded view — from CAD TL4064-29 · parts pulled along their assembly directions
Two operating modes

6 W egress to 60 W work light

Standard Mode is the default downlight state: 6 W meets the NFPA 130 baseline at 3:1 uniformity, and the same engine presets to any level an agency specifies — 1 fc at 10 W, 2 fc at 16 W. Work Mode adds uplight and lifts total output to roughly 60 W for OSHA 1926 work zones.

NFPA 130 compliance

Battery on the same downlight

The optional integral NiMH battery gives 1, 2 or 4 hours of ride-through on the same downlight — removing two-hour fire-rated emergency circuits, junction boxes and generators from the lighting scope. It self-diagnoses through clearNET.

clearNET wireless mesh

Every fixture reports

A 900 MHz self-healing mesh monitors fixture, driver and battery health, sets light level by tunnel, zone or fixture, integrates with existing EAM platforms and carries data for non-lighting sensors.

Impervious to abuse

IK10 · IP66 · tamperproof

Heavy-gauge extruded aluminium, high impact-resistant lensing, tamperproof stainless T15 centre-pin-reject fasteners and an IP66-rated housing withstand extreme physical and environmental abuse.

02 · Photometric proof

Uniform light at every level the code asks for.

Same fixture, same 25 ft spacing, same tunnel section. Select a light level to see the calculated illuminance on the walkway and the power it costs. Every setting is a preset per fixture over clearNET; the Work Mode row is the tested full output.

False-colour illuminance render of a tunnel section in MTLx Standard Mode at 25 ft spacing False-colour illuminance render of the same tunnel section in MTLx Work Mode with uplight
Standard Mode · downlight only
0.25fc
Minimum
0.44fc
Average
0.77fc
Maximum
6W
Fixture input
Minimum illuminance vs. the NFPA 130 floorwalkway centreline · max/min ≈ 3:1
NFPA 130 baseline1× floor
1 fc setting4× floor
2 fc setting8× floor
Work Mode29× floor
NFPA 130 · 0.25 fcOSHA 1926.56 · 5 fcWork Mode min · 7.18 fc
IP66

Sealed against the tunnel

Dust-tight and water-tight — the highest level of particulate and water protection short of the submersible categories.

OSHA 1926

Work light on demand

The 5 fc required for work in 1926.56 is exceeded along the whole walkway in Work Mode (7.2 fc minimum), with max/min near 3:1 for uniform working light.

NFPA 130

Egress on mains or battery

Emergency egress lighting for fixed-guideway transit and passenger rail. The 1 fc setting runs at 10 W; the 6 W baseline is the agency-specified minimum, on mains or on battery.

Made in USA

BABA compliant

All MTLx LED fixtures are made in Central Islip, New York and are BABA compliant. UL (pending), IK10, IP66. Five-year warranty.

Point-by-point calculation from Intertek LM-79 photometry of the TL4064-00-40 (reports 106664730CRT-001/-002, August 2026; IES files on request). Reference tunnel: 16'-8" diameter circular section; 14'-4" track to crown; 3' walkway 3' above track; fixtures 10' above track and 4" off the wall at 25' o.c.; 10% surface reflectance; 0.70 light loss factor. Illuminance reported at the walkway centreline. Setting names are minimum-illuminance targets; fc columns are the modelled result for that setting; the Work Mode row is the tested full output. Power is fixture input at 277 V including the clearNET node; the optional NiMH battery adds about 1 W of maintenance charge. Any level between the 6 W baseline and 60 W Work Mode can be preset per fixture over clearNET; Clear-Vu can provide simulations against specific customer light-level requirements.

03 · The network · in revenue service since 2018

We set it up once. After that, it runs itself.

clearNET is a 900 MHz self-healing wireless mesh built for one environment: the inside of a tunnel. Not a building protocol asked to survive underground — a radio designed for concrete, steel, curvature and moving trains, carried on the fixture itself. In NYCT revenue service since 2018 and tuned to NYCT specification 16ES.

01 · How it gets deployed

We commission it

Clear-Vu provisions every fixture, verifies node-to-node margin and hands over a mesh that is already reporting. No agency IT project.

02

It heals itself

Nodes discover their own neighbours and re-route around a failed or removed fixture. Adding fixtures extends the mesh; nothing is re-planned.

03

You get autopilot

Light levels, Work Mode windows, NFPA 130 self-tests and fault reporting run on schedule. The agency is notified, not asked to go looking.

2018
In revenue service
900 MHz
Licence-free band · outside 2.4 GHz CBTC
3,000 ft
Node-to-node reach
5,000+
Fixtures deployed
clearNET tunnel map dashboard showing a live fixture-by-fixture schematic with healthy, Work Mode, warning and critical states
Operating surface 1 · dashboard

Reports come to your inbox.

Two surfaces, and an agency only needs one of them. The dashboard is there when someone wants to look; everything that matters arrives on its own. Scheduled reports export daily, weekly or monthly, with a master-admin audit log of every control action.

Tunnel map · live schematicHealthyWork ModeWarningCritical
Track worker touching a magnet wand to the underside of an MTLx fixture from the tunnel walkway to trigger Work Mode
Operating surface 2 · magnet wand

Work Mode comes off a magnet.

A crew touches a magnet wand to the underside of any fixture from the walkway. clearNET propagates Work Mode across the entire tunnel segment for eight hours, then reverts every fixture to NFPA 130 egress on its own. No app, no login, no dispatcher, no site visit to turn it back off.

One touchWhole segmentEight hoursAuto-revert
Integration hooks

Read-only and control endpoints for SCADA, BMS and EAM platforms, so lighting state and fault data land in the systems an agency already watches.

Fixture mesh · 900 MHz→Gateway→SCADA · stateBMS · schedulesEAM · faultsAPI / BACnet

Frequency separation from CBTC

900 MHz operation sits outside the 2.4 GHz band used by most U.S. CBTC deployments. Across five-plus years and 3,000+ monitored fixtures, no CBTC interference incident attributable to the system has been identified by the host agencies.

Encrypted, segmented

AES-encrypted mesh traffic with OT/IT segmentation at the gateway — a defense-in-depth posture mapped to TSA SD 1582-21-01, IEC 62443 and NIST SP 800-82r3.

A floor no command can cross

The command dictionary contains no wireless instruction whose minimum legal argument falls below the NFPA 130 egress floor. Out-of-range commands are rejected at the firmware parser and logged. The worst attainable wireless attack is brighter light.

Linear-topology engineering

Tunnels behave as lossy waveguides with 21–32 dB train shadowing. Sub-GHz propagation and 1:1 fixture-to-node density keep margin through curves, crossovers and passing trains.

Get the wireless mesh whitepaper clearNET specifications
04 · The family

One platform. Three service models.

MTLx OG is the original — the platform already in service across North American transit. The 2026 edition adds MTLx Pro, with a hand-replaceable light engine for 15+ year mainline service, and MTLx Mini, a compact sealed fixture that comes off its bracket on two screws.

MTLx Pro, MTLx OG and MTLx Mini side by side on a tunnel wall
MTLx Pro tunnel fixture mounted on a concrete tunnel wall New · 2026
TL4064P

MTLx Pro

Mainline revenue · 15+ year design life

Same fixture. Next generation. Keeps the driver, surge protector, wiring and aiming on the wall and lets a technician take the LED engine off by hand from the walkway.

  • Hand-removable light engine · no tools, no re-aim
  • Integral 1,000–2,000 lm uplight · Standard + Work Mode
  • clearNET standard · magnet-wand 8-hour cycle
  • Optional NiMH 1 / 2 / 4 hr · 120–277 VAC, 480 VAC, 600 VDC
Get a quote Specs
MTLx OG tunnel fixture lighting a tunnel wall In service since 2018
TL4064

MTLx OG

The proven original · 10 year design life

The fixture already spec’d, installed and running across North American transit, including the Rutgers Tube. Same extrusion, same optic, same mounting as Pro — configured to order.

  • Downlight-only, or add 1,000–2,000 lm uplight (W1)
  • Optional clearNET (CN1) · Standard + Work Mode
  • Optional NiMH battery and ambient temperature sensor
  • Universal input: 120–277 VAC, 480 VAC, 600 VDC
Get a quote Specs
Compact MTLx Mini sealed fixture on a tunnel wall New · 2026
TL4064M

MTLx Mini

Mass retrofit · 15 years sealed

Two screws out. Fifteen sealed years in. The mass-quantity SKU on a Pro-anchored line — a 5.4" × 10.5" sealed body on a 4" bracket, factory-set to a specified foot-candle level.

  • Same LED array and silicone lens at lower wattage
  • No field-accessible fasteners · fully sealed electronics
  • Two T15 screws + one side-exit quick connect
  • 2.5" mount-hole centres · Metro-Guide-style retrofits
Get a quote Specs
Compare MTLx ProTL4064P MTLx OGTL4064 MTLx MiniTL4064M
Body18" overall18" overall5.4" × 10.5"
PositioningMainline revenueThe proven originalMass retrofit
Design life15+ years10 years15 years (sealed)
Light engineHand-removableIntegratedIntegrated, sealed
UplightIntegral, 1–2k lmOptional, 1–2k lmNot offered
Operating modesStandard + WorkStandard + WorkStandard only
clearNETStandardOptional (CN1)Not offered
NiMH batteryOptional 1 / 2 / 4 hOptional 1 / 2 / 4 hNot offered
Field serviceSwap the engineSwap the fixtureTwo screws
All three share the same LED and silicone-lens downlight engine and the same IP66 / IK10 extruded-aluminium housing family. Made in the USA. BABA compliant. Pro and OG share the 18" overall length (15.4" housing plus clearNET end-can; 22.4" housing with the 2-hour battery). Electrical: 120–277 VAC single or dual feed, 480 VAC, 600 VDC. Operating range −20 °F to +130 °F. Connections: 3' whip standard, QC1 / QC2 quick-connect, 2-hour fire-rated QC. See the brochure and individual spec sheets for full ordering matrices and photometrics.
MTLx Blue · TL4064-31 blue optic

Always on. Always watched.

MTLx Blue is a dedicated 12 W blue optic engineered to mark emergency phone locations and the other mission-critical points a passenger has to be able to find in a tunnel. It runs continuously — not on standby, not on battery, not switched — so there is a blue beacon burning over every phone, every day. Pro and OG Blue report their own health over clearNET, so a beacon that goes dark is flagged, located and dispatched before it costs anyone time.

12 W
Nominal · 14 W max
Pro · OG · Mini
Platform compatible
‘B’
Append to colour-temp field

The blue optic is a separate factory-installed module projecting below the housing — not a colour-temperature change to the mainline array — and cannot be retrofitted in the field. 120–277 VAC, wet location, IK10, five-year warranty. Blue-fixture density is set by the agency’s egress design.

MTLx Pro Blue, OG Blue and Mini Blue fixtures with blue beacon optics lit
05 · Field service · MTLx Pro

Three moves. One pair of hands.

The LED module releases by hand from the walkway. Driver, surge protector, wiring and aiming all stay on the wall, and a keyed seat preserves aim on reassembly. No tools, no rewiring, no re-aim, no re-commissioning.

Gloved hands supporting the MTLx Pro light engine by its integral handle in the locked position 01

Locked position

Engine seated in the housing underside; the integral handle is captured by the spring-clip release. Support it by the handle before anything else.

Technician pressing the spring clip and rotating the MTLx Pro light engine out of the housing 02

Press clip, rotate out

Press the spring clip and rotate the engine out by its integral handle — a partial rotation, less than a quarter turn. No tools.

MTLx Pro light engine lowered on its captive low-voltage lead with the inline quick-connect being unplugged by hand 03

Lower and unplug

Lower the engine on its captive low-voltage lead and unplug the inline quick-connect by hand. The replacement seats home, keyed; the clip re-engages.

Spring clipIntegral handleLV quick-connectKeyed seatNo toolsCrews follow agency isolation and track-access rules
⅓ load

Driver runs cool

Roughly one third of rated capacity with a 6 °C ISTMT case rise, well inside spec — the extrusion is the heatsink.

100k h

LED lifetime floor

The LED array carries a 100,000-hour lifetime floor; the 15-year target follows an Arrhenius projection on the OEM thermal data.

Minutes

Service, not replacement

Swap the engine on Pro; swap the fixture on OG; two screws on Mini. Every model is serviced from the walkway in a single visit.

06 · Track record

Fourteen years in transit tunnels. Every program still in service.

MTLx has been in North American revenue service since 2018 on NYCT and Amtrak — thousands of fixtures under rivers and along mainlines — and the programs that came before it are still on the wall.

NYCT · 2012–

12,000 LED lamp banks

Replaced legacy portable lamp banks. 80% less electricity, and the legacy fire risk eliminated.

Joralemon tube · 2016

3,000 Metro Guide lights

LED replacement for CFL tunnel lights plus battery. Est. 50% energy, 80% maintenance, 40% capital reduction.

NYCT ESI · 2018–

15 stations, 20+ fixture types

Design-build under the Enhanced Station Initiative, with custom DALI controls integration. Case study →

Canarsie L tube · 2020

1,300 MTLx · first clearNET

Battery and driver status reported wirelessly to the tunnel lighting room. Ambient heat-sensor proof of concept.

Rutgers F tube · 2021

MTLx + clearNET, 1:1 nodes

Post-Sandy rehabilitation under the East River. One mesh node per fixture, gateway at the platform, $2.7M documented savings. Case study →

Amtrak · Hudson Line

~1,100 MTLx · clearNET

Cellular backhaul on the Empire Corridor, replacing an off-the-shelf system that failed in the tunnel. Case study →

NYC Subway Enhanced Station Initiative — Clear-Vu linear LED fixtures illuminating an MTA station mezzanine
Featured Case Study

NYC Subway Enhanced Station Initiative

The Enhanced Station Initiative (ESI) represents one of the largest LED lighting modernization projects in mass transit history. When the MTA selected Clear-Vu as a core lighting partner, the scope was unprecedented: redesign the lighting infrastructure for 15 subway stations, each with unique architectural constraints and ridership patterns.

Clear-Vu's engineering team worked directly with MTA architects and safety engineers to develop over 20 distinct fixture products. Platform edge lighting required narrow-profile designs that could withstand train-generated wind loads. Mezzanine fixtures needed to meet both aesthetic design criteria and IP-rated environmental protection. Emergency egress pathway markers had to integrate with the 3-step DALI consequence management system to maintain wayfinding illumination during power events.

20+
Custom Fixtures
15
Stations
3-Step
DALI Emergency
Read Full Case Study
Tunnel Project Spotlights

Tunnel & Underground Infrastructure Case Studies

Under-river subway and mainline passenger rail — each with distinct compliance frameworks, operational constraints, and product specifications.

MTA NYCT — Under-river transit tunnel

Rutgers Tube

MTLx with integral battery and clearNET in the 1908 IRT under-river F-train bore. One mesh node per fixture, gateway at the platform, no trackside cabling. NFPA 130 §8.4 validated; $2.7M documented savings.

Read case study Amtrak — Passenger Rail & Wireless Control

Amtrak Hudson River Line

clearNET wireless mesh control deployed across an active Empire Corridor passenger rail segment. Per-fixture telemetry converts NFPA 130 egress compliance to a continuous, always-on operational metric, with BABA-compliant unified-package documentation for FRA reporting.

Read case study Interactive — Tunnel simulator

Model your own tunnel section

Set spacing, mounting height and target foot-candles and see how MTLx Standard and Work Mode land against NFPA 130 and OSHA 1926 — then request IES files for your own calc.

Open the simulator
07 · The economics

The fixture premium is real. It is repaid by the track access, labor and fire-rated cable the agency no longer buys.

Across North America, an estimated 300,000–400,000 legacy tunnel fixtures are not truly NFPA 130 or OSHA 1926 compliant: no 1–2 hour emergency continuity, lamps replaced every year or two, no remote diagnostics, and a temporary-lighting setup at the start of every night shift.

Legacy fluorescent vs. MTLx · 660-fixture under-river deployment

Same tunnel. Same egress requirement. Side by side.

MetricLegacyMTLx
Wattage per fixture56 W12 W
Maintained illuminanceDrifts below code2.5 fc maintained (10× NFPA 130)
Uniformity (max:min)~50:13:1
Service life2–3 years10–15 years
Emergency backupSeparate luminairesIntegrated (NFPA 130-compliant)
10-year cost (660 fixtures)Baseline−$2.7M
Source: The Hidden Liability in Your Tunnels, Clear-Vu Lighting whitepaper (Feb 2026). Field data from a 660-fixture under-river installation.
Modeled ten-year savings · per track mile

Three ways the same fixture pays back

NFPA 130 compliance — system-wide compliance without renovating branch circuits$584k
Used as a work light — temporary lighting setup and teardown eliminated$1.00M
Combined model$1.59M
Modeled figures, per track mile over ten years. Financial model developed in coordination with an agency executive team; assumptions and inputs available to qualified agencies on request. Not a guarantee of savings on any specific program.
08 · Hardening & qualification · Optional

MIL-STD-461 EMI compliance — available as an option

For rolling stock, signal-adjacent installations, and critical infrastructure where electromagnetic interference is a project requirement, we can deliver MTLx fixtures built and screened to MIL-STD-461. EMI compliance is engineered in at the driver, harness, and housing-shield level — not bolted on at the end.

Conducted Emissions

CE101 / CE102

Power-lead conducted emissions screened from 30 Hz through 10 MHz. Filters chosen to keep DC bus and rectifier byproducts off the train’s power feed.

Radiated Emissions

RE101 / RE102

Magnetic- and electric-field radiated emissions across the full vehicle-borne spectrum. Critical near track-circuit and CBTC equipment where stray emissions can desensitize signaling.

Conducted Susceptibility

CS101 / CS114 / CS115 / CS116

Survival under injected power-line ripple, bulk-cable current injection, fast transients, and damped-sinusoid lightning analogs. The fixture stays lit while the bus around it is being abused.

Radiated Susceptibility

RS101 / RS103

Operation under external magnetic fields and RF illumination from radios, traction inverters, and adjacent power equipment. No flicker, no dropouts, no reset.

How to specify: MIL-STD-461 hardening is a per-project option, not a stock configuration. Specify which sub-tests apply (Army / Navy / Air Force limit curves differ) and provide the host-platform definition. We produce a test plan, third-party data, and a signed declaration of compliance against the agreed sub-tests.
Blast & Overpressure

NYC explosion pressure-wave validation

Post-incident hardening expectations in dense urban transit drove an additional validation regime for fixtures specified in NYC tunnels and stations. MTLx tunnel fixtures have been validated against the NYC overpressure pressure-wave protocol — a transient-impulse test that mimics the structural and acoustic shock of a confined-space explosion.

Transient peak

Sub-millisecond pressure spike representative of a confined-space detonation in a tiled tunnel or station mezzanine.

Housing intact

Marine-grade extruded aluminum housing, captive tamper-resistant hardware, and gasketed end plates remain attached to the mount and to each other.

Lens captive

Cast polycarbonate vandal lens and hinge stay retained — no flying shards over egress routes — even under the post-event structural ringing.

Lit through event

Driver, harness, and integral emergency battery continue operating — maintaining egress illumination during and after the event window.

Documentation available under NDA. Specific waveform parameters, witness reports, and the agency-issued validation memo are available to qualified specifiers and procurement officers via sales@clearvulighting.com.
Patented Transit Fixtures · Rolling Stock

Hybrid & 600VDC traction-power emergency lighting

When utility AC drops in a transit tunnel, the train’s 600VDC traction-power bus is usually still alive long after the building feed is gone. Our patented hybrid fixtures cascade through three independent sources — AC → 600VDC traction power → internal 4-hour battery — so egress lighting stays lit through events that would dark a conventional emergency luminaire. MTLx itself accepts 600VDC input directly.

Patented triple-feed

SL-4095 Hybrid Emergency Downlight

120VAC + 600VDC + 4-hr battery

  • • Low-profile 16” extruded aluminum housing, IK10 vandal cover
  • • 4-hour 48V NiMH self-diagnosing battery, magnetic test switch
  • • 3500K / 4000K / 5000K · 900 lm · ETL listed
  • • Surface or pendant · −2° to +130°F operating range
Hybrid panel

SL3923-71 Hybrid Emergency Panel

90–277VAC + 600VDC (30%) + battery

  • • 4-ft pendant panel · 3,500 lm @ 3500K
  • • Universal 90–277VAC input, dual LED tubes with integral drivers
  • • Cable-hinged 0.38” cast polycarbonate vandal lens, gasketed
  • • UL listed, wet location, IP65, IK10 · −25° to +50°C
Traction-power only

SL3923-79 600VDC Downlight

600VDC input + 4-hr battery backup

  • • 2.5-ft edge-lit downlight · 2,300 lm @ 4000K standard
  • • 600VDC traction-power driver with charging indicator
  • • 4-hour 48V NiMH self-diagnosing battery
  • • UL listed, IP65, IK10 · surface or pendant mount
Transit T-8 LED tube · rolling stock

METRO Tube 8

MT8 (AC) · MT8-DC (DC) · MBT8 (battery backup)

  • • 360° illumination, shatter-shield seamless glass
  • • Single-pin theft-resistant base, direct line voltage
  • • Tested to transit surge, EMI, shock, and vibration standards
  • • Rail-car interiors, platforms, station BOH, fluorescent retrofit
Why the triple-feed matters. Most “emergency” luminaires fall back to a battery alone when AC drops. In a transit tunnel, traction power is usually still energized long after the building feed is gone — our hybrid driver uses that 600VDC bus as a second source before the battery is ever called on. Battery life is preserved for the worst case (full traction-power loss), and egress illumination rides through events that would have dropped a conventional fixture.
09 · Technical Resources

The brochure, four whitepapers & published commentary

The 2026 MTLx family brochure is free to download. Four engineering-grade whitepapers for capital programs, chief engineers and OT security teams require a corporate email; the op-ed is free to read.

Cover of the 2026 MTLx family brochure: the most advanced tunnel lighting system in the world
Brochure · 2026 edition · 15 pages

MTLx family brochure — Pro, OG, Mini & clearNET

Exploded view from CAD, Intertek LM-79 photometric proof at every light level, the clearNET network and operating surfaces, the three-model comparison, field-service procedure, full spec and ordering matrices for each model, and the MTLx Blue beacon option.

  • 01The platform — exploded view & four pillars
  • 02Photometric proof — 0.25 / 1 / 2 fc & Work Mode
  • 03clearNET — mesh, dashboard, magnet wand
  • 04The family — Pro · OG · Mini compared
  • 05–07Spec sheets — TL4064P · TL4064 · TL4064M
  • 08MTLx Blue — emergency-phone beacons
Whitepaper · Feb 2026

The Hidden Liability in Your Tunnels

Why legacy emergency lighting can’t meet modern NFPA 130 expectations — and how leading agencies bundle upgrades into capital projects already underway.

PDF · 8 pagesFor: capital programs
Get the whitepaper Whitepaper · Feb 2026

When the Lights Must Work

NiMH vs. LFP vs. NiCd in the highest-stakes environment. How a battery fails matters as much as how it performs — especially underground.

PDF · 10 pagesFor: safety, procurement
Get the whitepaper Whitepaper · Mar 2026

The “Driverless” LED

A close read of the patents and physics behind “Direct-AC” tunnel fixtures — and the $3M–$7M maintenance gap a 1,200-fixture install can hide over 25 years.

PDF · 23 pagesFor: chief engineers
Get the whitepaper Whitepaper · 2026

Wireless Mesh Networks in Subway Tunnel Environments

Zigbee, Thread, Wi-SUN, LoRaWAN, Wi-Fi HaLow and more, scored on tunnel RF reliability, linear-topology scalability and CBTC-safe security — with field data from 3,000+ fixtures across three agencies.

PDFFor: OT security, engineering
Get the whitepaper
Published Op-Ed · Mass Transit Magazine · Mar 2026

Transit tunnel lighting standards need to catch up

By Daniel Lax, CEO of Clear-Vu Lighting. Why NFPA 130 should be a starting point, not the finish line. Free to read — no email required.

Read article
View all transit resources NFPA 130 explainer Take the tunnel self-assessment
10 · What we’d suggest

A single-tunnel pilot. Low commitment. Fast validation.

The fastest way for an agency’s engineering team to evaluate MTLx Pro and clearNET is a bounded pilot: one representative tunnel section, roughly 150–200 fixtures, running for 90 days with your maintenance crew logging observations against the current baseline. Clear-Vu provides the fixtures, the wand, the gateway and the commissioning.

Week 1

Site walk-through

  • Joint tunnel visit to select the pilot section
  • Review mounts and junction boxes
  • Confirm power source: 120–277 VAC, 480 VAC or 600 VDC
Weeks 2–6

Install and commission

  • Installed by your crews or contractor over one to two overnight shifts
  • Clear-Vu on site for clearNET commissioning
  • Crew training on the engine swap and the wand
Weeks 7–14

Observation

  • Your crew logs against the current baseline
  • Dashboard access for the whole team
  • Scheduled email reports: health, battery self-tests, Work Mode activations

Or start smaller.

A bench demo of the engine swap and the magnet wand at our Central Islip plant, or a walk-through of a tunnel already running MTLx at NYCT.

Scope a pilot Book a bench demo

Start Your Transit Lighting Project

Our transit lighting engineers have decades of experience specifying solutions for subway systems, rail corridors, and underground infrastructure. One fixture family, one wireless layer, one accountable vendor.

Get a Quote Call 516-941-3737