Visible at a distance of over one mile, produces a bright light instantly, this watertight floating light features an eye for attachment to a lifejacket or sailing jacket. 100 % reliable, unbreakable, non-corrosive, watertight, nontoxic. It does not produce any flames or sparkles, it is nonflammable, does not require any batteriesand can be used in a variety of circumstances: Man overboard, gas leak, electricity failure or black-out, engine breakdown, windward use, in or below the water, mooring light... Dim cm 24X2. 1 blu RUN TIME 8 hours, 1 green and 1 red RUN TIME 12 hours