A script would work too, but you don’t need to write any code for this, the Rules card does exactly that. We use the same thing on our office floor.In the When section, add a “Time of day” trigger: 07:30, days Monday to Friday. Then in the Then section, add a “Send command” action: instead of selecting devices one by one, select every device in the profile, command relay.set, parameter on: true. A single action goes out to up to 200 devices in the profile, so 45 is comfortably within that.For devices that drop off Wi-Fi: set the command to “persistent by default” in the catalog. Then a command sent to an offline card waits in the queue and is delivered when the card reconnects. If it’s not persistent, a command to an offline device fails immediately. If one device fails, the rule carries on with the others, and you can see which one didn’t receive it in the History.To turn them off in the evening, set up the same thing as a second rule with 19:00 and on: false. Devices that have been switched to manual mode are skipped, so keep that in mind. Details: Rules card: actions.