Don Phillipson wrote:
"Motion detector" usually indicates an outdoor
light. If you want an automatic light for a laundry
room, why not connect the switch to the door so
that the light goes on only when the door is ajar?

Because, as the OP wrote:
"I have a motion sensor switch in my laundry room to activate the
lights.
(Very handy when you walk in with arms full of laundry...)"