Great video, Cheule! That meter looks fantastic. I'll have to pick one up. For anyone watching, just to clarify something, 1 Lux = 1 Lumen PER SQUARE METER, so Lux and Lumens are not synonymous and you cannot use one of these meters alone to measure Lumens.
Frankly, I really dislike that the website is telling you to multiply the intensity by 4 before taking the square root, when actually it should be intensity divided by illuminance (i. e. candela divided by lux). The lux you put in is the lux that you want at the distance you're calculating. Now, mathematically that's the same, but the former is obfuscating the real formula and the ANSI standard of 0.25 lux for throw ratings for no reason. By using websites like that and calculators instead of looking up the formula and plugging in the values yourself you end up not really understanding what you're doing (otherwise, the 0.25 lux would've been immediately obvious, too). Also, if you want to calculate a more "practical" throw distance for an illuminance of e. g. 2 lux, you just divide by 2 instad of 0.25 (which will of course result in a much shorter distance).
@@tacticalgrizzly9828 I wasn't trying to say Cheule is doing something wrong per se. It's just... where does the 4 in the calculation come from? People try to learn from these videos and if the website said "divided by 0.25 lux" and explained why it's 0.25 lux ("ANSI just decided it was a good value to pick, but feel free to pick your own illuminance value for your distance calculation") it'd be far more educational and clearer about what is actually going on. I'm more blaming the website than Cheule, but there isn't even an actual error here since dividing by 0.25 of course is the same as multiplying by 4. Though if the website explained it properly, Cheule probably wouldn't have guessed wrongly at 11:01 that the throw distance is where the illuminance is 1 lux (since ANSI decided it's 0.25 lux).
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
Great video, Cheule! That meter looks fantastic. I'll have to pick one up.
For anyone watching, just to clarify something, 1 Lux = 1 Lumen PER SQUARE METER, so Lux and Lumens are not synonymous and you cannot use one of these meters alone to measure Lumens.
A great point. I wasn’t clear at all. I’ll pin this comment.
Pretty cool to see someone else running Ubuntu! :)
Great job, thanks!
Glad you liked it!
Nice to see this is easier than I imagined! Also, waiting on your “garage sale” on r/flashlight…
Frankly, I really dislike that the website is telling you to multiply the intensity by 4 before taking the square root, when actually it should be intensity divided by illuminance (i. e. candela divided by lux). The lux you put in is the lux that you want at the distance you're calculating. Now, mathematically that's the same, but the former is obfuscating the real formula and the ANSI standard of 0.25 lux for throw ratings for no reason. By using websites like that and calculators instead of looking up the formula and plugging in the values yourself you end up not really understanding what you're doing (otherwise, the 0.25 lux would've been immediately obvious, too). Also, if you want to calculate a more "practical" throw distance for an illuminance of e. g. 2 lux, you just divide by 2 instad of 0.25 (which will of course result in a much shorter distance).
I disagree. I think everything he's doing here is perfectly good and acceptable.
@@tacticalgrizzly9828 I wasn't trying to say Cheule is doing something wrong per se. It's just... where does the 4 in the calculation come from? People try to learn from these videos and if the website said "divided by 0.25 lux" and explained why it's 0.25 lux ("ANSI just decided it was a good value to pick, but feel free to pick your own illuminance value for your distance calculation") it'd be far more educational and clearer about what is actually going on. I'm more blaming the website than Cheule, but there isn't even an actual error here since dividing by 0.25 of course is the same as multiplying by 4. Though if the website explained it properly, Cheule probably wouldn't have guessed wrongly at 11:01 that the throw distance is where the illuminance is 1 lux (since ANSI decided it's 0.25 lux).