Pick by light/pick to light

Pick to light or pick by light uses light-indicator, LED or LCD modules mounted to shelving, flow racks, pallet racks or other storage locations. 

This system tends to be used in conjunction with zone picking. 

To begin the process an operator scans a barcode on an arriving pick tote or shipping carton which denotes the next order number to be picked. This communicates to the system that the operator is ready to pick. The system then sends a message to the zone in which the operator is stationed and all the pick locations for that particular order light up at once.