-=> Mike Ross said to Greg Mayman
 -=> about "VEHICLE LED'S" on 10-02-03  23:16.....

 MR> I made the comparison starting at the nominal power rating, between a
 MR> linear resistance and the lamp.

Now that _IS_ comparing apples and oranges!

  Seems to me that to compare the lamp
 MR> to itself doesn't show how the current and power deviates from their
 MR> linear plots.

"Constant current" means the device draws the same current at a
particular voltage as THE SAME DEVICE does at different voltages.

"Constant power" means the device draws the same power at a
particular voltage as THE SAME DEVICE does at different voltages.

Comparing these curves with the current or power curves of a
DIFFERENT DEVICE tells you NOTHING about the constancy of the
power or current of this device.

And to say that the device has "constant power" because it
approximates to the power versus voltage curve of a linear
resistance is ridiculous. The linear resistance has a power curve
that increases as the square of the applied voltage -- hardly
"constant".

From Greg Mayman, in beautiful Adelaide, South Australia
   "Queen City of The South"    34:55 S  138:36 E

... The idle mind knows not what it is it wants.
___ Blue Wave/386 v2.30

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