solarwind wrote:
>> 1) Multiplexing will require more power than driving an LED
>> continuously.
>
> Really? I thought it requires _less_.

To the first order approximation it is the same power.  All the LEDs get lit
to the same apparent brightness, so it's roughly the same power.  However,
multiplexing causes individual LEDs to be run with high power for part of
the time instead of the average power all the time.  This requires higher
current, causing higher I*R losses.  The light output to current ratio for
LEDs also falls a bit for higher currents.


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