LUMA™.
Wireless at Depth.
10 Mbps Underwater.
LUMA is the world's most capable underwater wireless optical communication system. Three models — LUMA 100, LUMA 500 and LUMA X — span short-range sensor links to 10 Mbps HD video at 50 m. A 470 nm blue-light LED, a forgiving 120° beam and 1,500× the energy efficiency of acoustic modems.
Beyond acoustic. Beyond tethers.
Underwater data has always meant a trade-off — slow acoustic links, snag-prone cables, or laser modems that need millimetre alignment. LUMA removes all three constraints at once.
Acoustic Is Slow
Acoustic modems top out at a few kilobits — far too little for live video. LUMA X delivers up to 10 Mbps over the same kind of link.
Tethers Tangle
Umbilicals snag, drag and limit range in confined structures. An optical link cuts the vehicle free entirely.
Lasers Need Aiming
Narrow-beam laser modems demand precise pointing. LUMA's 120° cone simply needs two units roughly facing each other.
Power Is Scarce
Battery nodes can't afford power-hungry comms. LUMA moves each bit with 1,500× less energy than the fastest acoustic modem.
Wi-Fi-class data rates, through seawater
Blue-green light sits in the transmission window of seawater — the spectral band where absorption is lowest. LUMA exploits it with precisely tuned 470 nm LEDs and high-speed modulation, reaching data rates an acoustic modem can't approach while sipping a fraction of the power.
- LED wide-beam architecture tolerates AUV motion and ROV drift
- RS-232, RS-485 and Ethernet — software-selectable, no hardware change
- Sub-10 mW sleep power for always-on battery sensor nodes (LUMA 100)
- Hydromea leads the Subsea Wireless Group (SWiG) interoperability standard
Three Models. Every Mission.
Choose the LUMA model that matches your data rate, range and depth. All models share the same 120° wide-beam LED architecture and software-configurable interfaces.
LUMA 100
| Data Rate | 115 kbit/s |
| Range | 2 m |
| Depth Rating | 6,000 m |
| Dimensions | 100 × 50 × 30 mm |
| Supply Voltage | 12–36 V |
| Sleep Power | <10 mW |
| RX Power | 0.5 W |
| TX Power | 2–5 W |
| Interface | RS-232, RS-485, or Ethernet (configurable) |
| Beam Pattern | 120° cone |
Ideal for low-power sensor nodes, AUV docking stations and ultra-deep observatory links where minimal energy draw is critical.
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LUMA 500
| Data Rate | 500 kbit/s |
| Range | 50 m |
| Depth Rating | 6,000 m |
| Interface | RS-232, RS-485, or Ethernet (configurable) |
| Beam Pattern | 120° cone |
The versatile mid-range option for ROV telemetry, sensor data streaming and AUV-to-surface links where 50 m range and moderate bandwidth meet most operational needs.
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LUMA X
| Data Rate | 10 Mbit/s |
| Range | 50 m |
| Depth Rating | 12,000 m |
| Interface | Ethernet, RS-232, or RS-485 (configurable) |
| Beam Pattern | 120° cone |
| Capability | Real-time FHD video & 4K image streaming |
The flagship — real-time HD video, high-resolution imaging and complex AUV operations at any ocean depth. Integrates directly into EXRAY for untethered inspection.
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LUMA X-UV — operates in any lighting condition
The LUMA X-UV variant uses ultraviolet light instead of blue — so it keeps a clean link in the presence of other light sources, including ROV work lights and ambient daylight in shallow water. 10 Mbps, 6,000 m depth, titanium housing, serial and Ethernet interfaces.
Two form factors. One optical standard.
The compact LUMA 100 and 500 boards drop into sensor nodes and docking stations, while the cylindrical LUMA X carries the high-speed emitter and pressure housing rated to full ocean depth. Every model speaks the same software-selectable serial and Ethernet interfaces, so integration is consistent across a whole fleet.
- Configurable RS-232 / RS-485 / Ethernet on every model
- Depth ratings from 6,000 m to 12,000 m (full ocean depth)
- Drop-in compatibility with AUVs, ROVs, sensor nodes and topside
- SWiG-aligned for cross-vendor interoperability
LUMA Model Comparison
Side-by-side specifications for all LUMA models. Contact us for custom depth ratings, housing materials and integration support.
Full datasheets available on request. Contact us for application-specific configurations.
Wherever Bandwidth Matters Underwater
LUMA's high bandwidth and low latency open up underwater wireless applications that acoustic modems simply cannot support.
AUV Wireless Operations
Replace or supplement tethers on AUVs — real-time command, control and data transfer at up to 10 Mbps over 50 m. Ideal for docking stations, hover-capable AUVs and inspection robots like EXRAY.
Live Video Streaming
LUMA X carries enough bandwidth for real-time Full HD video — review footage live from a wireless ROV or camera node with no tether and no quality compromise.
Subsea Sensor Networks
Deploy low-power LUMA 100 nodes at each sensor — wireless mesh or star networks for environmental, structural and oceanographic data without cable infrastructure.
Deep-Sea Observatories
LUMA X's 12,000 m rating and LUMA 100's ultra-low sleep power suit deep-ocean observatories — offloading data to passing AUVs or ROVs on demand.
Defence & Naval
Covert high-bandwidth links, mine-countermeasure vehicle comms and hull-inspection data relay — with no acoustic signature and no physical cable to manage.
Offshore Asset Monitoring
Wireless links between seabed sensors, pipeline monitoring nodes and visiting AUVs — replacing expensive umbilical infrastructure for long-term campaigns.
LUMA + EXRAY. The untethered system.
EXRAY integrates LUMA directly — a complete wireless underwater inspection system. The ROV streams live FHD video over LUMA X while the pilot works from a cable-free station. No tether drag, no entanglement, no deployment constraints in confined structures.
- LUMA X integrated directly into the EXRAY vehicle
- Live FHD video over a 50 m wireless optical link
- Full 6-DOF control retained over the wireless channel
- NAVIA™ sensor data transmitted alongside the video feed
- Eliminates tether snag risk in tanks and confined spaces
Request a Quote for LUMA
Tell us about your application and we will recommend the right LUMA model and prepare a tailored quote. SepcoTech is an authorised Hydromea distributor.
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