Measure lumen output from flashlight.

[mwestern]

How exactly would one go about measuring the lumen output from an LED flashlight? I have done a quick google search and found there are pieces of test equipment which can measure LUX. Not to be an idiot but is there a simple way, or simple piece of equipment which can measure lumens? Yes I realize what the difference between lux and lumens is.

[RenThraysk]

For some crude measurements, there is the Ceilingbounce Android app

https://github.com/zakwilson/ceilingbounce

Requires an integrating sphere of some sort.

[Doctorandus_P]

That CeilingBounce seems to be a very crude setup of the way to go.

Some hints for further reading:
https://html.duckduckgo.com/html?q=integrating+sphere+lux+measuement
https://en.wikipedia.org/wiki/Integrating_sphere