Custom 55W DC24V Underwater LED Light for ROV | 150m Depth | Yingdige

Introduction

In nearshore pipeline inspection, aquaculture monitoring, port underwater detection, and small-to-medium observation ROV operations, off-the-shelf underwater lights commonly suffer from two critical pain points: excessive size and weight that increase robot payload, and inadequate circuit protection that leads to burnout from reverse polarity or overheating.

To address the specific customization requirements of an overseas client — lightweight ROV integration, DC24V low-voltage power supply, and 150-meter nearshore operation — Yingdige, backed by the complete underwater equipment R&D ecosystem of Haisi Langfang Technology, developed this compact stainless steel underwater light from the ground up. Optimized across optical, structural, and electrical dimensions, it delivers a balanced solution for brightness, pressure resistance, lightweight design, and circuit safety — establishing a replicable standard for custom underwater lighting.

1. Client Requirements Breakdown

The client is a European nearshore marine engineering service provider specializing in small observation ROV underwater inspection. Their core hard constraints were:

1. Power supply must be compatible with the vehicle's DC24V bus — no high-voltage input, to avoid umbilical voltage drop risks;
2. Strict size and weight limits to preserve ROV underwater maneuverability;
3. Operating depth of 150 meters in nearshore seawater with long-term exposure to high-salinity environments — corrosion-resistant housing required;
4. High-brightness, wide-angle, daylight-accurate color temperature for underwater video documentation — minimizing color cast;
5. Multi-layer electrical protection to handle field wiring errors and sustained full-power operation, reducing equipment failure rates.

Based on these requirements, the Yingdige engineering team completed a full custom parameter development:

2. Three Core Custom Engineering Highlights

1. Optical System: Balancing Brightness, Wide Angle, and Underwater Imaging Quality

To address underwater imaging challenges, the light uses a 6200K neutral cool-white spectrum — unlike conventional warm-yellow underwater lights, this accurately reproduces the natural colors of subsea pipelines, marine life, and underwater structures, making it ideal for synchronized operation with HD PTZ cameras for documentation.

The 105° wide-angle flood lens module eliminates lighting dead zones. A single unit covers the full forward inspection area of the ROV, eliminating the need for additional auxiliary lights and simplifying onboard wiring and installation. The 6,000-lumen high-efficiency output maintains clear visibility even in turbid nearshore water conditions.

2. Lightweight Pressure-Resistant Structure: Compact Form Factor with 150m Sealing Integrity

Given the client's limited vehicle thrust budget, the structural team adopted a precision-machined one-piece stainless steel housing, achieving a Φ60×L100mm form factor while maintaining full 150-meter hydrostatic sealing performance.

Through buoyancy-optimized structural design, the light achieves an ultra-low weight of 500g in air and 400g in water — adding negligible load to small ROVs and improving underwater hovering and directional maneuverability. The stainless steel construction withstands long-term immersion in high-salinity nearshore environments with no corrosion or housing cracking, reducing lifecycle maintenance costs.

3. Three-Layer Smart Electrical Protection: Eliminating Field Failure Points

Standard underwater lights typically offer only basic waterproofing with no circuit protection. The client reported frequent field failures from reverse wiring and thermal burnout during extended full-power operation. Yingdige engineered three dedicated safety layers:

1. Automatic Thermal Regulation: Real-time LED temperature monitoring with automatic power reduction under high-temperature conditions — stabilizes lumen output while slowing LED degradation;
2. Over-Temperature Shutdown Protection: Cuts power supply when temperature exceeds the safe threshold, preventing LED chip burnout and extending fixture service life;
3. Reverse Polarity Protection: Incorrect positive/negative wiring causes zero damage to the driver board — eliminates field operator errors as a failure mode and significantly reduces after-sales repair costs.

The system operates on a DC24V low-voltage bus, fully compatible with standard small/medium ROV power architectures. It can be integrated with Yingdige's subsea wet-mate connectors, penetrators, and topside control systems for a complete turnkey solution.

3. Target Application Scenarios

This custom underwater light is purpose-built for nearshore lightweight subsea operations, covering a wide range of client use cases:

1. Small observation ROV inspection of subsea pipelines and port steel structures;
2. Aquaculture net pen underwater condition monitoring;
3. Periodic inspection of port infrastructure and underwater civil structures;
4. Underwater event filming and HD video documentation auxiliary lighting;
5. Nearshore marine small-scale scientific observation equipment lighting.

4. Project Delivery and System Integration Advantages

1. Controlled Custom Development Timeline: From requirements intake, optical simulation, structural modeling, and hydrostatic testing to sample delivery — with flexible adjustment of power, beam angle, and depth rating on request;
2. Full System Integration Capability: Yingdige, in partnership with Haisi Langfang Technology, can supply matched subsea wet-mate connectors, cable penetrators, underwater cameras, and topside integrated control systems — providing a one-stop ROV underwater lighting and imaging solution;
3. Certified for Export: Finished products can be supplied with CE, RoHS, and EAC certifications, meeting market entry requirements for European, Southeast Asian, and Latin American marine engineering projects;
4. Full Factory Testing Protocol: Every unit undergoes 150-meter hydrostatic immersion testing, salt spray corrosion testing, thermal cycling, and circuit burn-in testing — near-zero outgoing defect rat.

5. Summary

Off-the-shelf underwater lights cannot meet the strict size, weight, and electrical protection requirements of specialized lightweight ROV platforms. Yingdige, drawing on years of custom underwater equipment R&D experience, successfully delivered a 150-meter nearshore small ROV lighting solution — integrating optical, structural, and electrical customization to resolve the client's three core pain points: poor underwater imaging, excessive payload, and frequent fixture burnout.

We continue to offer non-standard custom underwater lighting services to marine engineering clients worldwide, with flexible configuration of operating depth, supply voltage, form factor, optical specifications, and protection ratings — delivering purpose-built, reliable underwater lighting systems for all types of ROVs and subsea detection equipment.

Contact Us

Interested in a custom underwater lighting solution for your ROV or subsea project? Get in touch with our engineering team:

• Email: ydg@yingdg.com
• WhatsApp / Phone: +86 190 1271 0367
• Website: www.yingdg.com

We respond to all inquiries within 24 hours and offer free technical consultation for custom subsea lighting projects.