Hi Dunk,
Not sure if this will answer you question but i posted a couple of comparison photos earlier in the year using my Astronomik CLS-CCD LP filter. I have a mixture of orange and white streetlights and it seems to do quite well. Check out about half way dow the thread for the shots. (single frames ).
http://www.iceinspace.com.au/forum/s...d.php?t=118924
Goran.