Hi, cool game idea.
I don`t like that it is kind of try and error on the areas where you don`t have any light. because you don`t see where you are running around.
But at least the sound gives a feedback that you are on the correct path i guess.
I like the effect when you picked up the lightbulb and it illuminates the way to the socket. Also the movement of the character is good (whenever i can see him) ;)