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ACR FireFly Pro Waterbug SOLAS LED Strobe Light Water Activated 3971.4 Bulk
ACR FireFly Pro Waterbug SOLAS LED Strobe Light Water Activated 3971.4 Bulk
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ACR FireFly Pro Waterbug (Bulk) - 3971.4
SOLAS Approved Water-Activated LED Emergency Strobe
The ACR Firefly PRO Waterbug (SKU 3971.4) represents the pinnacle of marine safety signaling. This SOLAS-approved strobe light is specifically designed for automatic deployment in man-overboard situations. Equipped with integrated water sensors, the unit activates immediately upon immersion, providing a high-intensity 360° beam that is visible for over 3 miles. The "Cool White" LED technology eliminates yellow tinting, ensuring the light penetrates further through mist and rain than standard strobes.
Key Features
- ✔ Water Activation: Automatically turns on when submerged
- ✔ 4 Operating Modes: Armed, Strobe, SOS, and Steady-On
- ✔ 360° Visibility: High-output 41 Candela LED
- ✔ Ultra-Compact: Fits easily in life jacket pockets
- ✔ Military Spec: Rugged, corrosion-resistant casing
Technical Specs
| Light Intensity | 41 Candela (Strobe) |
| Visibility | Over 3 Miles |
| Battery Type | 2 x AA (Lithium/Alkaline) |
| Strobe Runtime | > 56 Hours |
| Steady Runtime | > 28 Hours |
| Waterproof | Tested to 33ft (10m) |
| Weight | 68g (without batteries) |
Compatibility / Fitment Guide
| Application | Mounting Compatibility | Notes |
|---|---|---|
| Inflatable Life Jackets | Internal or External Loops | Compact size fits most PFD brands |
| Survival Suits | Integrated Strobe Pockets | SOLAS approved for commercial use |
| Search & Rescue | Belts / Packs | Manual and water-activation options |
OEM Cross Reference
| ACR Manufacturer Part Number | 3971.4 (Bulk / Loose Pack) |
| Retail Equivalent SKU | 3971.3 (Carded Packaging) |
| UPC Code | 791659003398 |
| Certifications | USCG, SOLAS, MED, CE, Transport Canada |
Questions & Answers
Is this a genuine original part?
Yes, this is an authentic ACR Electronics product. The "3971.4" SKU indicates it is the bulk packaging version, which contains the exact same high-performance strobe as the retail carded version.
How do I know if it is compatible?
This light is universally compatible with any life jacket or survival gear that accepts a standard clip-on or lashing-loop strobe. If you require SOLAS or USCG approval for your vessel's safety inspections, this unit meets those strict requirements.
Will it activate if it gets splashed with water?
The Waterbug feature is designed to activate once submerged. While minor splashing is unlikely to trigger it, we recommend setting it to "Armed Mode" only when on the water to prevent accidental activation during cleaning or rain.
Note: Batteries are not included. We recommend the use of AA Lithium batteries for maximum runtime and shelf-life. Please verify your equipment requirements against the SOLAS/USCG certifications listed above.
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