Signalling device and method of signaling service quality

摘要

The invention relates to a signaling device for signalling for a service in for example a restaurant. The signalling device comprises a housing; at least one light source affixed to the housing; a switch; and, a controller for turning the at least one light source in response to the switch in an activated state and deactivated state. The controller is further arranged to vary with time at least one visual characteristic of the light source when activated to indicate a time period for which the at least one light source has been in the activated state. The signalling device enables waiters to see which customer in their service area has been waiting longest for a service and to help him before other customers who have been waiting shorter.