The Lamp is one of the characters in Pajama Sam in "No Need To Hide When It's Dark Outside". He wears glasses and live in Darkness's Living Room.
In all games, the lamp will be shown dancing inside Darkness's living room and will remaining dancing while Sam has not actually entered the living room. When Sam does enter all the furniture jump back into their proper places and remain stationary.
When Sam leaves the living room after after actually entering the room, the lamp will tell the other furniture they can go back to dancing as Sam has left the room.