These Lifejacket lights are intrinsically safe certified as per SOLAS / MED / ATEX requirements and rated at ‘II 2 G Ex ia IIC T3 Gb, suitable for hazardous atmosphere Zones 1 & 2, They are suitable for hazardous marine and offshore applications such as Tanker vessels, Oil Rigs, etc. The lights are water and manual activated and emits flashing white light, which can accurately indicate the survivors` location to increase the success rate of rescue. The lights are designed to float in water. It has 3 modes of operation FLASHING/ STEADY / SOS / OFF.

http://djkmarine.ae/atex-lifejacket-light/