Clifford 3.5 question about domelight out

Hey, First of all I have an 02 Subaru WRX and I'm getting a Clifford Matrix 3.5.  Right now I am planning the install out. I think I've got it about all figured out, but my one question is concerning the domelight supervision output. I understand that I wire up the door trigger input on the alarm to the door trigger of the car in the integrated module. But there is a domelight output on the clifford, does this wire go into the door trigger wire of the car too or is there a domelight wire in the car? What is the purpose of this wire, wouldn't my domelight go on when the doors are locked and off when unlocked anyway? And do I need a relay, the clifford output says it's only 200mA so it probably wouldn't power my domelight?