Description

The ACR C-Light LED Emergency Light 3963.1 is a compact, manually activated personal distress light designed for low-light emergency location assistance. This steady-on LED light uses a bright 20 lumen white LED, runs for more than 30 hours in typical operating conditions, and features a slim waterproof housing suitable for life jackets, PFDs, backpacks, emergency kits, and general marine safety use.

Key Features

• ACR part number 3963.1 — C-Light, carded version.
• Manual twist ON/OFF activation for simple, reliable operation.
• 20 lumen white LED for emergency location assistance.
• Steady-on light type; this is not the water-activated H2O model.
• Continuous operating life of more than 30 hours at 30°C and more than 20 hours at -1°C.
• Waterproof tested for 24 hours at 3.3 ft / 1 m.
• Impact-resistant case for marine and outdoor use.
• Uses two AA 1.5V batteries, sold separately.
• Size: 5.06″ x 1.38″ x 1.2″ / 12.85 x 3.5 x 3.0 cm.
• Weight: 1.2 oz / 33 g without batteries.
• Carded version includes PFD clip, lanyard, and Velcro strap.
• Certifications include USCG/SOLAS, CE, and Transport Canada.

Intended Use

The C-Light is intended for emergency visual location assistance on life jackets, inflatable PFDs, vessel safety kits, personal survival gear, backpacks, and outdoor emergency kits. Its slim body and flexible mounting options make it suitable for marine safety use as well as camping, paddling, biking, and other low-light emergency situations.

Fitment Notice

This is the manual activation C-Light 3963.1. For applications that require automatic water activation, use the C-Light H2O 3962.1 version instead. Confirm the required approval standard for your vessel, operating area, and onboard safety-equipment list before replacing or adding emergency lighting.

When This Product Needs Replacement

Replace the light if the housing is cracked, the twist switch becomes unreliable, the battery compartment shows corrosion, the light output is weak, the unit fails testing, or the light no longer meets the required onboard safety standard. Batteries should be checked regularly and replaced before expiry, seasonal launch, offshore trips, or long-term storage.

Installation Notes

Attach the C-Light to a compatible life jacket, inflatable PFD, backpack strap, or emergency kit using the included mounting accessories. The carded version includes a PFD clip, lanyard, and Velcro strap, allowing the light to be secured to webbing, straps, or an inflatable life jacket’s oral inflation tube. Test the light after installing fresh AA batteries and before placing it into service.

Alternate/Superseded Part Numbers

Related ACR C-Light references include:

• 3963.1 — C-Light, carded version
• 3963 — C-Light, bulk version
• 3962.1 — C-Light H2O, carded water-activated version
• 3962 — C-Light H2O, bulk water-activated version

Parts Desk Insight

The important detail with this model is activation style. 3963.1 is the manual C-Light, which is best when you want a simple twist-on steady emergency light. For PFD setups where automatic activation on water contact is required, the H2O version is the better match.

Shipping: Ships within 3 days for fast Canada wide shipping.