Life gear glow stick
REI link

{ 1.3 oz, 7.5 inches}

runs 200 hours, 4 modes, includes ( for some reason) a whistle and is $5 at Target. Will this replace chemical lights?

200 hours @ $5 is cheaper than 10 chem light sticks ( even at .50 each and 12 hours run time= is 120 hours of light.)