A type of order-fulfillment technology designed to improve picking accuracy and efficiency, while simultaneously lowering your labor costs. Notably, pick to light is paperless; it employs alphanumeric displays and buttons at storage locations, to guide your employees in light-aided manual picking, putting, sorting, and assembling. 

There are small variations in pick-to-light systems, but the standard works like this:

1. Operators scan item barcodes that are attached to temporary and reusable holding containers, for example, shipping cartons.
2. The system’s alphanumeric display (usually, LED lights) then lights up, illuminating a path to guide the operator to the indicated storage location. There, the system then indicates how many and which items should be picked.
3. The operator picks the item(s), places them in the holding container, and then presses a button to confirm the picking.
4. The system continues in this way, illuminating each sector for picking until all items have been picked and placed in their respective holding containers.

[Source: 6River]