I spoke to someone who suggested to unplug the Transformer on the landscape lighting to see if that worked the others. The suggestion being that the transformer is interfering with the remote operation. If so, get a filter for the transformer. Does this make sense?
I can understand noise from the transformer being a problem, but why would it only apply to hours of darkness?
Any help appreciated. Thanks
Did you unplug the transformer and see if things worked?
Is the landscape lighting new? (like last week?) If not and system worked before, I doubt it is the landscape power supply, assuming it is a transformer and not a switching power supply, transformers do not "suddenly become" noisy (I suppose there are exceptions but there ain't a lot in a transformer to become noisy).
What did you get new last week that might be on only at night (i.e. cell phone charger, new computer, TV, etc. )
Yes, if you locate the noise source, plugging it in to an X10 noise filter frequently cures the problem. Sometimes it takes two filters.
http://kbase.x10.com/wiki/Selecting_a_Filter