Since you are new, (welcome!!!) take a gander at this, it will help avoid some gotchas. Pay attention to the zigbee section since you are starting with zigbee.
So with this is it a mechanical button or soft button to turn it on? So if you turn the unit on and then unplug it physically, then plug it back in, does the unit come on or does it stay off?
For this I use a centralite night lite (also has a battery backup and is a zigbee repeater). After 10:30 if you enter the bathroom, it comes on at 25% in blue which is bright enough not to miss the toilet, but not bright enough to wake you.
Not exactly sure what you mean here. Do you plan on having multiple sensors in the bedroom turning on certain lights? Can you clarify?