Quieter than a flight of bats

Exploration Stage: Maze of Fear
From: Adeline Svensson
Description: Place a nightlight that emits white noise near the cradle so that Boo can sleep longer. I have one on when I write my articles and it doesn't bother me at all. Could you help me recharge it?
Completed: Now this cute little monster won't be woken up by noises. This everlasting light will work for hundreds of years and I can come back to make sure all is well.