Radium House Escape

 Dream up a situation there lived two friends in a house. One of them working in day shift and the other in night shift. The guy working in night shift locked the door and went to office. When the other guy woke up, there is no power inside the house. Eventhen everything is visible because of radium stickers. Meanwhile, when he searched for the key, it was lost. Now it is his responsibility to find the alternate key to escape from the house. Surely you could help him to escape.