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There's two versions of the CLS. You either need the CLS CCD version, or if you already have a standard CLS just add the L filter or other UV / IR blocker.
As for the 540-630nm range, there's often a lot of comet emissions in that part of the spectrum, if you're into comets.
I find the CLS rather heavy handed for mild LP. You might be better off with a milder filter like Baader Moon and Skyglow, Idas LPS or similar broadband filter.
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