Do I need to do this under advanced settings
Yes. er, edit - No. Sorry, I do all of my programming in advanced or use the wizards for WAV pumps and DOS dosing.
Just select control type = light.
Here's mine. I don't have heat issues.
Fallback OFF
If Time 23:00 to 07:00 Then ON
If Time 07:00 to 23:00 Then OFF
That second line may not be needed, I haven't tested it.
Mmmmm, gotta test that.
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