The Daniamant W4-A / M4-A Lifejacket Light is a compact, high-visibility safety light designed to automatically illuminate when a lifejacket is immersed in water, helping rescuers quickly locate a person overboard. Featuring a bright white flashing LED with a minimum output of 0.75 candela, it provides at least 8 hours of continuous operation to meet international maritime safety standards. The rugged ABS and polycarbonate housing incorporates an ultra-low profile dome that helps protect the light from damage during evacuation or heavy use. Powered by an alkaline battery with a 5-year storage life and operating in temperatures from –30°C to +65°C, this SOLAS, MED, and USCG-approved light delivers reliable performance for commercial and recreational marine safety equipment.