Designed as emergency signalling devices, these light sticks last for up to 12 hours, aiding rescue services in pinpointing your position.
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As an alternative, you may prefer.....
|Long lasting emergency back up, (get some).|
|Reviewed By Angus, 19 Aug 2012|
Whether kept in the car or in your backpack these do come in very handy & tend to outlast with aplomb their use by dates (usually 2-3 years, i've used them succesfully 4+ years after best by date) ..just by being slack with kit change rather than miserly) ..they provide a handy "see me" level of light to get you out of a fix, I prefer the yellow & orange as they appear that bit brighter in terms of overall luminosity, whereas the red is often duller (reason unknown).