ACR Firefly PRO SOLAS Strobe Light — Manual 3-Mode, 41cd, 360° | ACR 3970.3
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The ACR Firefly PRO SOLAS Strobe Light 3970.3 is a compact, manually activated emergency rescue light designed for life jackets, ditch bags, vessel safety kits, and personal emergency signalling. It features three operating modes—ultra-bright strobe, SOS strobe, and steady-on—so it can be used for long-range visual signalling as well as close-up recovery operations. The wide-emission cool white LED produces a 360° beam with 41 candela strobe intensity and visibility of over 3 miles.
Key Features
- SOLAS model, ACR part number 3970.3, carded version.
- Manual ON/OFF activation — this is the non-water-activated Firefly PRO SOLAS version.
- Three operating modes: strobe, steady-on, and SOS.
- 41 candela / 257 lumen strobe output with cool white LED visibility over 3 miles.
- Run time: 56 hours strobe, 28 hours steady-on, and 30 hours SOS.
- Size: 4.4" x 2.2" x 1.2" / 11.7 x 5.7 x 2.8 cm.
- Weight: 2.39 oz / 68 g without batteries.
- Factory tested waterproof depth: 33 ft / 10 m.
- Uses AA batteries; batteries are not included.
- Approvals include SOLAS, USCG, MED, IMO LSA, and CE.
Intended Use
The Firefly PRO SOLAS is intended for emergency visual signalling on boats, life jackets, survival gear, commercial marine safety kits, and personal rescue equipment. It is suitable for recreational and commercial marine use where a high-visibility emergency strobe is required or preferred.
Fitment Notice
This is the manual SOLAS version of the Firefly PRO series. For applications requiring automatic water activation, use the Firefly PRO Waterbug version instead. Always confirm the required approval standard for your vessel, region, and onboard safety-equipment requirements before replacing or adding emergency signalling gear.
When This Product Needs Replacement
Replace an emergency strobe light if the housing is cracked, the switch does not operate reliably, the light output is weak, the battery compartment shows corrosion, the unit has failed testing, or the equipment no longer meets the required onboard safety standard. Batteries should be checked regularly and replaced before expiry or extended storage.
Installation Notes
Mount the Firefly PRO SOLAS where it can be reached quickly in an emergency, such as on a life jacket, belt, pack, or emergency kit. The compact body, two lashing loops, and included Velcro strap are designed to make mounting straightforward while keeping the light accessible when needed. Test operation before service use and install fresh AA batteries according to the instruction sheet.
Alternate/Superseded Part Numbers
Related ACR Firefly PRO references include:
- 3970.3 — Firefly PRO SOLAS, carded
- 3970.4 — Firefly PRO SOLAS, bulk
- 3971.3 — Firefly PRO Waterbug, carded
- 3971.4 — Firefly PRO Waterbug, bulk
Parts Desk Insight
The key difference to watch is activation style. 3970.3 is the manual SOLAS model, which is ideal when you want positive control of the strobe. If the application calls for automatic activation when submerged, the Waterbug version is the better match.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.