An apparatus comprises a controller and an input for receiving a signal from a microphone. The controller processes the signal from the microphone to detect a sound associated with the use of a consumable by a user, and generates an output in response to detecting that sound. For example the consumable may be pre-packaged and the sound may be associated with the packaging. In embodiments the controller controls ambient lighting in response to the sound of a first action (e.g. opening the cap of a container), and controls task lighting in response to the sound of a second action (e.g. dispensing the product from the container). In another embodiment the controller detects a sound indicative of the consumable running out (e.g. the hollow sound of the container being put down on a surface), and in response generates a visible indicator or transmits a signal over a network.