Leigh, you've mentioned using the #19 filters in other posts. Do you actually open the glass sandwich and replace the existing filter or leave the old one in?Originally Posted by Leigh B
Rubylith is red. It will dramatically reduce the brightness of the monochromatic yellow sodium vapor lamp used in the Thomas Duplex.
Not a good choice IM[-H]O.
- Leigh
Steve
Oops! Never mind, I read the later posts. Thanks. :-)
11-02-2012 06:00 PM
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Last edited by scheimfluger_77; 11-02-2012 at 06:28 PM. Click to view previous post history.
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