The EDF1 operates in several light modes, ranging from economy to high to ultra. It emits a red emergency strobe light in a 360-degree hemisphere broadly visible from land, sea and air. When it’s fastened to a vest, it also has a beam function that operates the LEDs on only one side. A trigger guard protects the device from accidental activation to protect the batteries. An SOS setting simplifies signaling distress. SUMMARY: The device is easy to use, the instructions are graphically printed right on it, and it projects light in a hemispherical orientation to be visible above and at 360 degrees. We liked the automatic SOS function. It doesn’t float and can be tethered to a vest but requires attention to keep it visible on the water’s surface. Our judgment is it would be a useful addition to a ditch bag, ideal for night distress signaling but unable to meet day-signal carriage requirements of pyro flares.
COAST GUARD APPROVED: No
SOLAS APPROVED: No
SHELF LIFE: Five years (per warranty)
BURN-TIME SPECS: Six hours
WATERPROOF: Yes (10 meters)
VISIBILITY: Up to 7 nautical miles
POWERED BY: Lithium-ion battery
REFLECTOR RANGE: 150 yards
A bright, long-burning life-jacket light.