This is a civilian version of a military rescue helicopter pick-up light.
While the Firefly2 contains only a strobe light, the Firefly2 Doublefly contains both strobe and incandescent light bulbs.
Use the strobe function for boat or helicopter rescuers to locate you from a distance, switch to the incandescent light so rescuers can make their final approach to you without being blinded by the strobe.
Having a single battery for both bulbs, this device is not currently USCG approved, and cannot be used as a PFD or immersion suit light on inspected vessels.
• Large sliding switch allows for easy operation by gloved hands
• High intensity xenon strobe bulb and incandescent bulb
• Ideal for life vests, safety harnesses, float coats, work suits, immersion suits, backpacks and flight suits
• Weight: 4.0 oz (113 g) with lithium batteries, 4.7 oz (133 g) with alkaline batteries