Hi Peter:
> Any limitations/requirements for amount of light emitted from professional
> photography flashes? Any UL, IEC or European standards which specify
> limitations?
>
> I know how many you like being photographed - but imagine what harm one of
> these flashes can cause to your eyes!
The root question is what is the maximum safe optical energy
as a function of time for the eye?
I suspect there are many research documents for this eye
parameter. Check out this optical radiation safety calculator:
http://vision.arc.nasa.gov/personnel/jbm/home/exps/java/safe_txt.html
The calculator is described for situations such as when the eye
is illuminated for photography. I suspect this is for steady-
state and not for flash. But, it should provide some references.
Good luck, and best regards,
Rich
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