Olin, do you ever fully read a paragraph or do you always dissect each
sentence as a stand-alone?

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Olin Lathrop
Sent: Monday, September 17, 2001 7:03 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: Lamp S-Curve Table


> Although I haven't tried this, I can
> imagine some bulbs might peak in a particular spectral area and then begin
> decreasing as color temperature is increased.

While possible in theory this is not the case for normal filament bulbs.
These bulbs are actually very efficient in converting electrical energy into
radiation.  The problem is that most of this radiation is at longer than
visible wavelengths.  The spectral distribution of this radiation is
governed by the black body radiation law of physics.  Surface coatings can
have some effect, but mostly filament bulbs follow the black body radiation
pattern, which is only a function of temperature.  A bulb with a filament
temperature to maximize the radiation fraction at visible wavelengths is not
practical with any material available to us due to the filament temperature
required.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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