Joining the crapfest as of now!
Ok I like crap… I like texaspyro 
i love this kind of crap! thanks a lot
I don’t like crap.
Kudos to your 2000+ posts.
Ya lux meter
I LOVE crap!
I for one support this Yeti-free zone seeing how my clan of Sasquatches has been at war with the Yeti for untold millenia. Drivelousdrivel…I’minthankyoutexaspyro
I don’t have a lux meter so… I like crap!
Same here, so I like crap!
I like crap
but
I need a light meter for sure.
I like crap
Meeeeeeeeeeeeeow!
I like crap, thanks for this giveaway!
I like the idea of having a light meter, and am considering purchasing one just on the reasoning that the odds are against me winning this one. But how would I know if it was off, 20% or otherwise? Is that where having a light with a semi-known output comes in handy? For example, the EDC+ Triple XP-G2 was measured in a lumisphere as having 720 lumens out the front. So that would be the benchmark in testing a new lux-meter? How then is lux converted to lumens? And as far as that goes, who knows I COULD win this one, the question still applies as to how to read the lux given in an interpretation of lumens. Is it as simple as dividing the number given as lux by the 720 previously tested on the EDC+ when testing the EDC+ to derive the multiplier?
How is such a device used? Pretty much point-blank? A foot from the sphere? A meter? 10 meters? All these points and an average taken? How do you infer the lumen output of a floody light versus a light with a quite intense hot spot? Obviously those are 2 different beasts, the one with the hot spot will show more lumens at a meter than the floody light will sheerly based on the amount of light that does not hit the meter.
Is it possible to build a lumisphere from a meter such as this one? How difficult is that? I’ve seen builds of lumispheres on here and elsewhere and there are some great idea’s out there. The one using a large kids ball and covering it with paper mache seems like a real winner. One of those 24” or even 30” balls would be killer, making the shelf for the lux meter’s globe to sit on wouldn’t be all that difficult and it’d be great to know exactly what difference a given driver made or an upgrade to a copper star with next level emitter. Heck, even a change in battery brand or chemistry would be noticeable if you could measure the output in a precise manner! So an aperture based opening with 8 or 9 blades would be good to allow lights of different sizes to easily be used, simply dial in the correct opening diameter to allow minimal or no light loss for the diameter of the head being used, this could be in association with a variable height shelf on a slider with a thumb screw so that any light would lay on the shelf and easily be adjusted to center in the aperture. I think this could be pretty darn cool!
And it all starts with the ability to measure the light. Thank you TexasPyro for starting this snowball rolling down the steep slippery slopes of flashaholism! 
Enough drivel?
Lux is generally not convertible to lumens; that’s why we need integrating spheres. There is no simple formula to convert between the two, for exactly the reasons you asked about in the second paragraph.
To use it, ideally you’d take a reading exactly one meter from the light, and look for the absolute brightest spot in the beam. However, many throwers still have a donut in their beam at this distance, so you must instead measure from farther away and convert the value back to what it would be at 1 meter by using the inverse square law. Double the distance and the value changes by a factor of four. Triple the distance and it changes by a factor of nine. Etc.
I love crap!
I like crap. Lol
The inverse square law is a constant issue in Photography when flash units need to be used. Difficult to explain to point-n-shoot users with tiny underpowered flash units pulling power from the same power supply as the camera.
Thanks for the help, appreciate it.
as witnessed by the condition of my basement. Now crap that measures things, that’s as good as gold!