Here is a link to a tutorial I put on the X10 Forum about[url=
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Existing X10 Systems To Work With CFLs[/url].
I happen to use an X10 CM15A with Active Home Pro (AHP) to control my modules but the modifications I describe are control system independant so should work equally well any other systems.
You do not need to register on the X10 Forum to read posts but only to make your own posts. If there are many replies here, instead of on the X10 Forum, about this tutorial I'll put a link back here from there.