[sdiy] LED maximum peak current

[Czech Martin]

I want to build very bright LED indicators.
Now, the normal spec is average current , e.g. 20mA.
If I use transients, this can be a lot more.
I remember my first design project as EE, it was an "inherited"
design that should send IR telegrams. It had three integrated transitors
on it, each 30000um wide (this IS substantial) and could
deliver peak currents up to 1A into each of the three IR
LEDs. The current was regulated.

Now I want to do something similar, but I don't wat to do
the current servoing in a discrete design for obvious reasons.
I want to use the internal parasitic resistance of the
LED.
Do red (very bright) LEDs have the same current tolerance,
i.e. 1A for a single pulse?
What pulse rate and duty cycle is needed to make the apearent
brightness as large as possible?

Any LED expert on the list?

m.c.