You cannot do what you are asking.
Either the voltage source will drop to the voltage of the LED
or more current  ( greater than 1 ma ) will flow until the LED blows up.

Imagine applying 1000 psi water pressure to a water turbine.  If you  
limit the
flow of water ( current ) to the WT to a trickle, the WT will not turn  
and
the pressure will be across the limiter and not across the WT.  If you  
supply
unlimited amounts of water to the WT at 1000 psi ( which is hard to  
do ) , the WT
will spin so fast it may blow up.

Let's say someone gives you a choice.
1)  They will direct 100 liters/minute of water into your open mouth  
at .01 PSI
2)  They will direct  .01 liters/minute of water into your open mouth  
at a pressure high enough to cause the flow.
3)  They will direct  .01 liters/minute of water into your closed  
mouth at a pressure high enough to cause the flow.

Which would you choose first and second ?

For #3 , if you could close your mouth very tightly, the water would  
simply be blown through your skin and into your mouth.
Even though it is a low flow, it would hurt you.
Gus

> On Jul 4, 2009, at 11:49 PM, solarwind wrote:
>
> People say current kills. So what happens if you push 1 mA through an
> LED @ 1000 V? Will the LED blow?
>
> -- [ solarwind ] -- http://solar-blogg.blogspot.com/
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