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[geoffhazel]

I have two table lamps connected via extension cord to a single appliance module -- non-dimming with a loud "click" when it activates.  Now I thought this kind of module had a relay that actually cut the power 100% to the units but apparently not!  Even after I turn it "off" the lights "flicker" or "flash" and sometimes, they even turn back on ("click") on their own -- the module turns on by itself!

Do I misunderstand the appliance module's inner workings?  Is there an inherent problem in controlling CFL bulbs with X10 equipment? And why do those CFL bulbs flash even when the power is "off"?   I saw the same thing when I had a "dimmable" module in use at that location, and thought switching to the appliance module would solve my problems.   Sadly, it has not.

[Brian H]

Yes the older appliance modules have a Local Control Sensing Circuit in them. It allows you to toggle the module on by cycling the lamps on off switch.
This current is enough to allow the CFLs electronic ballast to try and run. Many times resulting in flashing the CFL or the flash triggers the Local Control and it goes back on. Low current LED lights also glow on appliance modules from the Local Control Sensing current.

Try adding a small 4 watt night light to the appliance modules output. One of those taps that alllows more then one device in an AC  socket will do it.

The new design appliance modules do not have the Local Control Circuit in them and should work much better with CFLs. X10 even calls them CFL friendly. They still may keep LEDs glowing. Since yours sound like an older one. The night light maybe the best cure or getting new ones.
Some users here are also using Socket Rockets with CFLs and having good results. Though the official X10 stand is use only incandescent bulbs in a Socket Rocket.

[jamesjr]

Brian,
   What is considered older?

[Brian H]

We don't have any exact data from X10.
I know my Date Code 08A02 is one of the more CFL friendly appliance modules.
Maybe late 2007 as that is when the Lamp Modules and possibly the appliance modules where redesigned; or early 2008.
There is still a small amount of current on the CFL friendly ones that can cause real low power LED light to still glow when off.

[jamesjr]

Ok thanks Brian.