The L8-4 is a water-activated personal rescue light that is FAA approved for use on life vests. The lamp and lens combo of the L8-4 produce a powerful light that’s visible for over one mile. This rescue light has a water activated battery, and once it’s triggered, it’ll last for 8 hours.

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  • FAA approved for use on life vests
  • Lamp and lens combo produces brilliant light visible for over one mile
  • Operates in fresh or salt water
  • Standard length lead wire 18 inches (46 cm); some custom lengths available (minimum quantities apply)
  • Water activated battery
  • Operation life exceeds 8 hours

Additional information

Weight 0.00 lbs

Product Number 3730.0180 Bulk only
Size 3.1 x 1.8 x 1.6” (7.9 x 4.6 x 4.1 cm)
Weight 1.8 oz (51g)
Battery Size 3.7 x 1.0 x .42 in (9.4 x 2.6 x 1.0 cm)
Battery LIfe Extended useful life with plugs left in place
Battery Type Cuprous iodide/magnesium
Operational Life Exceeds 8 hours
Stowage air temperature range -30°C to +65°C
Operating temperature (in water) -1°C to +30°C
Material High impact styrene
Activation Pull tab, immerse in water to activate
Waterproof 10 ft ( 3 m)
Beam Angle Horizontal >2°, vertical >15°
Visibility Lamp and lens combo produces brilliant light visible for over 1 nautical mile (1.85 km)
Lamp Incandescent
Luminous Intensity >= 1 cd
Certification FAA TSO-C85, UK CAA
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.

*Five Years for the following products:  EPIRB, PLB ,  S-VDR,  SSAS.