The compact, rugged, and waterproof C-Light (non-water activated) and C-Light H2O (water activated) are USCG/SOLAS approved and have a 20 lumen LED that typically operates for 30 hours continuously. These steady-on personal distress lights feature an impact resistant case – making them reliable, multi-purpose lights whenever efficient distress lighting is needed.



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The C-Light is activated manually with an easy twist on/off activation and the C-Light H2O model includes two activation methods; the light can easily be activated with a simple push of the on/off button or when in the armed position, can be activated automatically when immersed in water.


The slim, lightweight and versatile design fits easily in a pocket or hangs discreetly when attached to a life jacket or backpack.  The flexible lashing loops on the side of the product allow for multiple mounting options including the webbing on your backpack or straps on your life jacket.  The Velcro® strap can be secured around the lashing loops and creates countless additional mounting possibilities.  The light also comes with a clip designed to conveniently slide over your inflatable life jacket’s oral inflation tube for storing your light inside your life jacket.



  • For location assistance during low-light emergencies
  • Exceedingly bright 20 Lumen White LED
  • Extensive continuous operating life of greater than 30 hours
  • Waterproof – Tested for 24 hrs at 3.3 ft. (1m)
  • Easy twist On/Off activation
  • Impact resistant case
  • Uses two “AA” 1.5V batteries (not included)
  • USCG/SOLAS Approved
  • Ideal for life jackets, camping, biking, auto, etc.
  • Included Velcro® strap (with carded version) used in conjunction with integral lashing loops for mounting flexibility
  • Included PFD clip (with carded version) for easy attachment to oral inflation tube
  • Water activation sensors – Automatic activation when in contact with water (Exclusive to C-Light H20 – 3962.1)

Additional information

Weight 1 lbs
Dimensions 9 × 9 × 5 in

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Product Variant

C-Light (3963.1), C-Light H20 (3962.1)

Product Number C-Light: 3963 (Bulk) / 3963.1 (Carded)

C-Light H2O: 3962 (Bulk) 3962.1 (Carded)


Size C-Light: 5.06″ x 1.38″ x 1.2″ (12.85 x 3.5 x 3.0 cm)

C-Light H2O: 5.56″ x 1.38″ x 1.2″ (14.1 x 3.5 x 3.0 cm)


Weight C-Light: 1.2 oz (33 g) without batteries

C-Light H2O: 1.4 oz (40 g) without batteries

Operational Life >30 hr at 30°C (>20 hr at -1°C)


Operation C-Light: Manual twist On/Off

C-Light H2O: Manual On/Off button or Water Activation

Activation Method C-Light: Manual Activation Only

C-Light H2O: Water or Manual Activation

Waterproof Tested for 24 hrs @ 3.3 ft (1m)


Lamp 20 Lumen White LED


Light Type Steady On


Battery 2 AA batteries (sold separately)


Certification USCG/SOLAS, CE, Transport Canada


Reverse Battery Protection Yes


Accessories (with carded version) PFD Clip, Lanyard, Velcro Strap


Limited Warranty 1 year





This product is warranted against factory defect in material and workmanship for a period of 1 (one)* year from date of purchase or receipt as a gift. During the warranty period ACR Electronics, Inc. will repair or at its option, replace at no cost to you for labor, materials or return transportation.

For further assistance, please contact our Technical Service Department at :

ACR Electronics, Inc.
5757 Ravenswood Road
Fort Lauderdale, FL 33312-6645.

Email: service@acrelectronics.com, Fax: +1 (954) 983-5087, Telephone: +1 (954) 981- 3333.

This warranty does not apply if the product has been damaged by accident or misuse, or as a result of service or modification by other than the manufacturer.  The COMPANY MAKES NO REPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR ANY OTHER MATTER WITH RESPECT TO THIS PRODUCT, except as otherwise expressly stated in the previous paragraph. The Company shall not be liable for consequential or special damages. In order to place the warranty in effect, choose a form above and complete it entirely. Or you may fill out the registration card accompanying your product (if applicable) which must be returned to ACR Electronics, Inc. within ten days of purchase.