At 08:59 PM 9/18/2007, David Kao wrote...
>Your example of LEDs in serial is regular signal LEDs not for lighting
>applications. Regular LED runs at 10 - 50 ma small current. Luxeon
>LEDs are working at 0.5 - 0.7 amp. Your serial resistor is 390 ohm.
>The one for two Lexeon in serial with 12 volt supply will be less than
>5 ohm. Try to short one out and see the smoke yourself.

So when you said "If you don't have LEDs to play with come to grab from
my bench. I have at least a couple hundreds of them now," you were
talking about 3W Luxeon's? I'm impressed. I notice you totally ignored
both the comment about current drivers and the manufacturer's
statements.