Arte, I've seen supernanny doing a similar thing, hopefully you get some progression with it over time.

Our DD likes to have the hallway light on & the door left open a crack. She wasn't getting up (she's still in her cot LOL) but a couple of times when she's been mucking around I have threatened to shut the door if she doesn't lie down and be quiet. Each time it has taken a couple of goes of the door being shut (I go in after 5-10 min and give her another chance to earn having the door open) and she's settled down pretty quickly.