Meet the ACR Firefly Pro Waterbug LED Strobe Light Carded — a SOLAS-inspired signaling beacon with a built-in water activation feature that powers on automatically when submerged. This versatile light gives you four activation modes to match any situation on the water, from hands-free activation to targeted signaling.
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Armed mode for automatic water activation — ready when you need it without manual intervention.
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Ultra-bright strobe to maximize visibility in challenging conditions.
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SOS strobe to visually alert Search and Rescue of your location with internationally recognized signaling.
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Steady-On for close-up recovery operations or continuous illumination during tasks.
The Firefly Pro delivers a 360-degree beam with cool white LEDs that are over 41 candela bright, ensuring you’re seen from a distance. Its light is designed for long-range visibility, providing brightness beyond 3.2 miles. A modern microprocessor and energy-efficient electronics mean exceptional runtime — more than 56 hours of continuous operation, which is 48 hours longer than SOLAS/USCG requirements and twice as long as many competitors.
Key specifications
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Lamp: LED — cool white
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Strobe intensity: 26.8 candela minimum
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Strobe rate: 60 P/M +/-
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Beam: 360-degree coverage
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Water activation: Submersion-activated; automatic activation
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Waterproof depth: Factory tested to 33 feet (10 m)
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Operation: ON/OFF switch and water activation
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Run time: Over 56 hours continuous operation
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Size: 4.4 x 2.2 x 1.2 inches / 11.7 x 5.7 x 2.8 cm
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Weight: 2.39 oz (68 g) without batteries
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Certification: SOLAS - Pending, USCG - Pending, IMO LSA - Pending, CE - Pending
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Product Number: 3971.3 (Bulk)
Designed for reliability in demanding marine environments, the Firefly Pro Waterbug is compact and easy to store on any vessel. Its cool white LED output eliminates yellow tint for clearer signaling, while the water-activated feature ensures you’re seen even when you can’t reach the switch. Carded packaging keeps essential signaling technology ready for quick deployment when every second counts.
| Product Number | 3971.3 (Bulk) |
| Size | 4.4 x 2.2 x 1.2 inches / 11.7 x 5.7 x 2.8 cm |
| Weight | 2.39 oz (68 g) (without batteries) |
| Operation | Manual ON/OFF switch and Water Activation |
| Waterproof | Factory tested to 33 feet. (10 m) |
| Lamp | LED - cool white |
| Strobe Intensity | 26.8 Candela minimum |
| Strobe Visibility | Over 3.2 miles |
| Strobe Flash Rate | 60 P/M +/- |
| Strobe Operation | 56 hours minimum |
| Certification | SOLAS - Pending, USCG - Pending, IMO LSA - Pending, CE - Pending |
