Abbreviated history of high power single cell flashlights
A user interface is the way that someone interacts with a device. In the case of flashlights, it’s normally by 1 or more switches that are pressed. A UI can be the different between a flashlight staying on a shelf or being used regularly.
You may have noticed that this blog seems to focus on flashlights (or “torches” in the UK). They’re simple things compared to most technology but their elemental nature makes them almost entrancing.
I started looking for the best pocketable flashlight that throws its beam a long way. This article documents the rabbit hole I ended up in. In it I’ve compared lights from EagTac, Lumintop, Acebeam and Emisar.
Multiply the candela by 4, then square root it to get the throw in meters.
Or square the throw in meters then divide by 4 to get the candela.