At 07:10 PM 12/27/02 +1000, you wrote:
>Hi Everyone,
>
>How far can you push an LED when you pulse it with a low duty cycle?
>
>I want to get the maximum perceived light (brightness) from a 7000mcd White
>LED. (actually a number of them in a series/parallel arrangement)

In general, where the flicker rate is not perceptible, the highest
apparent brightness will be with DC drive, give or take a bit depending
on the semiconductor material and absolute drive levels. It will *not*
make a big difference  except negatively at the extreme high end.

It's because of the way the human eye works- it is an "average" reading
device, not a peak reading device.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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