Description: single sound of a light switch flipped on or off.

Description: single sound of a light switch flipped on or off.

Description: single sound of a light switch flipped on or off.

Description: single sound of a light switch flipped on or off.

Description: single sound of a light switch flipped on or off.

Description: single sound of a lamp being twisted on or off.

Description: single sound of a lamp being twisted on or off.

Description: single sound of a lamp being twisted on or off.

Description: single sound of a lamp being twisted on or off.

Description: single sound of a lamp being twisted on or off.