Re: [ATM] Source for low-pressure Sodium fixture/parts

[Ken Lowther <hermit@outofoptions.org>]

Quoting Guy Brandenburg <gfbrandenburg@yahoo.com>:

> What I did is this: I went to a theatrical supply house and I looked 
> at their theatrical lighting gels. Fluorescent lights have a very 
> much brighter line in the green range, I forget exactly how many 
> nanometers, that is much brighter than their red line. (But be 
> careful - some types have 2 very-close-together green lines.) It's 
> the line from mercury. The theatrical places have little bitty sample 
> pieces of the gels, that come with little bitty spectral cutoff 
> graphs, so this gives you some idea of what light they will pass and 
> what lightwaves get filtered out. I selected one filter to get rid of 
> the unwanted wavelengths towards the red (from the green) and one 
> filter to get rid of the unwanted wavelengths towards the violet, and 
> stacked them on top of each other. Before purchasing them, I made 
> sure to use my Project STAR spectrometer to then look at the local 
> fluorescent lights through the gel samples to make sure that they 
> worked as they should. They did.
> The combination works very well, except that I wish i had a brighter light.
>
> The gels are actually quite cheap - a few dollars or so each.
>
Which make an color/number did you end  up getting?


Hermit, holed up in Youngstown, Ohio
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