What would you guys consider to be the minimum number of lumens for a flashlight to be bright enough to allow you to navigate safely? 10 Lumens? Thanks
1 lumen is enough to light up my bedroom, for me to walk from my bed to bathroom without stepping on my son's lego blocks.
However, if you are walking in the forest trails or even cycling. Then I would say if more light is needed the faster you travel. For cycling, you may need 120 lumens, enough light to cover 30~50 metres of the ground in front the bike.
They should last more then a short time on a set of batteries (many of what are called “tactical lights” fail this one, and fail miserably!) They run off the CR123 batteries (more expensive) and only run for 1 ˝ hrs, this is a very poor choice of a light for a survival situation.
Tactical lights are designed to give maximum brightness for a short duration maybe 20minutes. Their intended users are law enforcements, etc.
Survival lights are designed to give a long duration of light (not maximum brightness)
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