Re: "Full-spectrum" article on Wikipedia

On Tue, 5 Jun 2007 19:12:23 +0300, "Ioannis"
<morpheus@xxxxxxxxxxxx> wrote:

"Ioannis" <morpheus@xxxxxxxxxxxx> wrote in message
news:1180995876.457290@xxxxxxxxxxx
[snip]

Based on my understanding of what they write, I *think* what they
mean
then for the FSI calculation is the following:

FSI = sum((100-i_k)^2,k=380..730)/(730-380) =

[(100-i_380)^2 + (100-i_381)^2 + ... + (100-i_730)^2]/350

where i_k is the spectrum intensity at wavelength k of the measured
source (with both sources maxima being at 100). That looks indeed
like
a mathematical metric.

Wonderful :-)

Will notify the group when all calculations are redone. Terry goes
in
the credits and so does this article.

Unfortunately, although the formula appears valid, my numerical
results don't quite agree with the values that the authors give. This
means that the formula is probably guesswork on my part.

I wrote to one of the authors and asked for the specific formula used,
but received no response. Till I get the exact expression for how FSI
is calculated, I cannot work on the issue.

If anybody has further ideas about it, they are welcome.

Your formula seems correct. How far off are your
calculations? can you post a couple of results?

Except for incandescent lamps, I don't see that Table 1 of
the LRC publications gives you enough information about the
spectrum of the lamps in question to make an accurate
calculation.

--
Vic Roberts
http://www.RobertsResearchInc.com
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