PTL system uses light indicator modules mounted to shelving, flow rack, work benches, pallet rack and/or other storage location. When auser scan the RFID tag/barcode, the PTL system lights up each of the SKUs that required to pick. The operative can then see at a glance which products are required, confirming each pick by pushing the illuminated button and turning it out. When all products are picked, all lights will be off and the next order can begin.