ACR HemiLight3 LED Flashing Survival Light — Auto Water-Activated, SOLAS/USCG/MED, Life Jacket | ACR 3764
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The ACR HemiLight3 LED Flashing Survival Light 3764 is a compact, water-activated survival locator light designed to attach to life jackets and personal flotation devices. It uses a high-intensity flashing LED that automatically activates when it contacts fresh or salt water, and it can be manually deactivated with the red button. The rounded, compact housing is designed for use on inflatable life jackets and meets USCG, MED, and SOLAS safety requirements.
Key Features
- ACR product number 3764 — HemiLight3 LED strobe, bulk version.
- Water-activated flashing LED survival light for life jackets and PFDs.
- Automatically activates on contact with fresh or salt water.
- Manual deactivation button for shutting the light off after activation.
- Operating life of 20+ hours.
- Fits up to 2" / 5 cm PFD webbing straps.
- Size: 2.44" x 1.19" x 1.13" / 6.19 x 3.02 x 2.87 cm.
- Weight: 0.98 oz / 28 g.
- Non-hazardous, non-replaceable 5-year lithium battery.
- Polycarbonate housing with upper-hemisphere beam angle.
- Watertight to 10 ft / 3 m and rated to meet IMO standard.
- Approvals include USCG, MED, and SOLAS.
Intended Use
The HemiLight3 is intended for marine safety use on life jackets, inflatable PFDs, commercial vessel safety gear, abandon-ship kits, crew-overboard preparedness, and personal survival equipment. Its automatic water activation makes it well suited for situations where the wearer may not be able to manually activate a light immediately after entering the water.
Fitment Notice
This survival light is designed to fit up to 2" / 5 cm PFD webbing straps and can be retrofitted to many life jacket styles. Always confirm the required approval standard for your vessel, operating area, and safety-equipment list before replacing or adding life jacket lights.
When This Product Needs Replacement
Replace the HemiLight3 if the housing is cracked, the clip or mounting area is damaged, the light fails to activate during testing, the battery life has expired, the unit has been submerged or stored in a way that may affect reliability, or the product no longer meets the required onboard safety standard. The internal lithium battery is non-replaceable, so the complete light should be replaced when the battery service life has ended.
Installation Notes
Install the HemiLight3 on a compatible life jacket or PFD strap by placing the strap between the bottom of the light and the convex side of the clip, then snapping the clip into the side indentations to secure it. Once installed, the clip is not designed to be removed easily, so confirm placement before final installation.
Alternate/Superseded Part Numbers
Related ACR HemiLight3 references include:
- 3764 — HemiLight3 strobe, bulk
- 3764.1 — HemiLight3 strobe, carded
- 3763 — HemiLight3 10-pack reference
Parts Desk Insight
For life jacket lights, the important match is not just the part number—it is the activation style, approval standard, and how the unit mounts to the PFD. The HemiLight3 is a strong choice when you need a compact SOLAS/MED-style automatic light that can stay mounted directly on the life jacket.
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.