1. Create two groups: Group 1 and Group 2
2. In group 1 are the devices of the group that we want to arm with the general arming. We have to enable the option 'Arm with general arming'
3. In group 2 we'll lace the rest of the devices (the ones we are going to arm with the Night Mode). In this case, we disable the option 'Arm with general arming'
4. One by one, within the menus of the devices we want to arm with the Night Mode (the ones in group 2), we have to activate the 'Night Mode' option.
Summarizing: when the arming button is pressed, Group 1 will be armed and when the Night Mode button is pressed, the devices in Group 2 will be activated.