I found a "standard" curve published somewhere that is supposed
to take into account nonlinearity of lamp output and nonlinearity of
human perception of lamp intensity.  The curve gave an RMS voltage for a
specified percentage intensity (with 100% = 120Vrms).  I took a bunch of
points on the graph and developed a power series to represent this curve
between 0 and 100%.  Here's the power series.  You can drop it into your
favorite graphing calculator, math program (I'm using the shareware CC4)
or computer language to generate a table or whatever.

Harold



Vrms(x)=3.7192063561x-1.9826283199e-1x^2
 +8.2505490236e-3x^3-1.8179894417e-4x^4
 +2.1421958023e-6x^5-1.2870370627e-8x^6
 +3.1084656826e-11x^7

x=intensity in percent





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