I wanted to respond to comments on my idea to use the battery backup instead of light sensor to trigger a night mode. First, thanks for comments! The sensor supplied did not allow me to point it at the light source since I don't want to put the controller on my aquarium (it's on the cabinet ledge which is very convenient). The suggested light sensor with longer leads may allow that and that could be an option.
But the idea that using the backup battery is extra work is not true. This is 30 sec of programming the WP40 outlet in my Apex controller to turn off/on at desired times. It's simple and I get full control of when night mode is started/stop. I'll try this as soon as the Tunze safety connector shows up and reply. If that gives me some unexpected issue, I'll go back to light sensor and try that.
But the idea that using the backup battery is extra work is not true. This is 30 sec of programming the WP40 outlet in my Apex controller to turn off/on at desired times. It's simple and I get full control of when night mode is started/stop. I'll try this as soon as the Tunze safety connector shows up and reply. If that gives me some unexpected issue, I'll go back to light sensor and try that.