Good stuff, Alex G.!
Yeah, some years ago, I'd talked to folks about the whole FoC thing and what might be construed as "the most accurate" while also considering what our eyes "enjoy best", etc.
In general, the most screen accurate is a yellow-ish orange flash (makes sense)... whereas if we're trying to get the most out of the LED, it's always nice if we can get the most bright white light.
Additionally, it really makes an "impact" on our eyes when colors CHANGE from one color to another... vs. just go from green to "greener". :)
THAT said... I often found it ridiculous that a purple saber would briefly turn orange or whatever... or a green saber turning orange and so forth... but at the SAME TIME... seeing something that was GREEN go to "white with around 25% of green" was bloody awesome (in my opinion).
Ultimately, I think it's up to the end-user to do what they enjoy best... but... it does seem clear that the following make the most sense:
* Any color (for normal blade)... yellow-ish orange flash -- very brief, but "viewable" flash time/duration
* If blue color (for normal blade)... white-ish flash with blue overtones -- very brief, but "viewable" flash time/duration
* If green color (for normal blade)... white-ish flash with green overtones -- very brief, but "viewable" flash time/duration
* If red color (for normal blade)... white-ish flash with red overtones -- very brief, but "viewable" flash time/duration
* etc.
The latter "white" flashes can be tough to do with LEDEngins at the present time... but... the future is likely to yield some variations in LEDs that will be really cool for FoC(tm!!!) setups.
And yes... Erv, Edwin & myself were the original folks who FOLLOWED THROUGH on seeing the "flash on clash" idea in sabers. I was pushing the idea all day long in 2007... Edwin (Eandori) did the proof of concept... Erv provided the hardware to see it happen in a real-time + executable way... and all three of us discussed it, almost ad-infinitum all throughout the process.
Here are some vids I did regarding FoC back in the day:
In general, I preferred a longer FoC duration for these... but... that was because of video cameras not being HD! :) These days... I think the cams can pick up much more subtle changes! :)
Anyhow... great stuff, Alex G.! Keep up the testing--it's always worth helping others to discover what is cool in the LED saber COMMUNITY.