Put-to-Light system

What is a Put-to-Light system?

A Put-to-Light system is a digital warehouse technology that guides employees on where items should be placed during sorting, packing, or order fulfillment. The system typically uses light indicators at bins, shelves, or storage locations to show which order or destination an item belongs to.

When an item is scanned, the correct location lights up, allowing the employee to quickly place the item in the right spot. Put-to-Light is especially used in warehouse environments with high order volumes, fast picking processes, and a strong need for accurate sorting.

The purpose is to reduce errors, save time, and create a more efficient order flow.

How does a Put-to-Light system work?

A Put-to-Light system works by combining scanning technology, warehouse data, and visual signals into a single workflow. When an employee scans an item, the system identifies which order, customer, or shipment the item belongs to. A light or display then illuminates at the correct bin, shelf, or packing station.

In practice, Put-to-Light is often used after the actual picking process. Items may, for example, be picked together through batch picking or wave picking, before being distributed across multiple orders. The light-guided system helps employees quickly place each item in the correct container without manually reading through long order lists.

The system can also be part of a broader pick and pack process, where the goal is to make the transition from picking to packing as smooth as possible. Once the item has been placed in the illuminated container, the employee typically confirms the action by pressing a button or scanning again. This digitally records the movement in real time.

Where is Put-to-Light used?

Put-to-Light is mainly used in warehouse environments where many items need to be sorted quickly and accurately. This includes e-commerce businesses, wholesalers, distribution centers, and companies handling many small orders with short delivery times.

The method is especially relevant when multiple orders are processed simultaneously. Instead of completing one order at a time, warehouses can combine items into larger picking rounds and then efficiently distribute them using light guidance. This reduces walking time, minimizes manual interpretation, and makes it easier to scale operations during busy periods.

Put-to-Light can also be integrated with a WMS, where inventory data, order status, and item locations are managed digitally. This supports a more structured and data-driven approach to inventory management.

Benefits of Put-to-Light systems

A Put-to-Light system can create significant value in warehouse operations because it makes workflows more visual and less dependent on manual interpretation. Employees do not necessarily need to search for order numbers, read detailed instructions, or compare multiple lists.

The key benefits include:

• Fewer picking and sorting errors
• Faster order fulfillment
• Reduced training time for new employees
• Improved workflow between picking, sorting, and packing
• Increased capacity when handling many simultaneous orders

These benefits become particularly clear in businesses where order management and warehouse processes need to work closely together. When items can quickly be assigned to the correct orders, it becomes easier to ship accurately and on time.

Put-to-Light compared to Pick-to-Light

Put-to-Light and Pick-to-Light are similar technologies, but they are used in different parts of the warehouse process. Pick-to-Light guides employees to the location where an item should be picked from. Put-to-Light, on the other hand, guides employees to the location where the item should be placed.

In short, Pick-to-Light is about finding the item, while Put-to-Light is about distributing the item correctly. That is why Put-to-Light is often used after a consolidated picking round, where multiple items have already been collected from the warehouse and now need to be sorted into different orders.

Both technologies share the same overall objective: making warehouse operations faster, more accurate, and less dependent on manual processes.

When can it be relevant to combine Put-to-Light with warehouse operations?

Put-to-Light becomes relevant when a warehouse requires high precision in sorting and packing processes. This is especially true for businesses with many order lines, numerous small shipments, or a wide variation in product types.

Although a Put-to-Light system is typically considered a specialized warehouse technology, its effectiveness depends heavily on accurate underlying data. If inventory levels, order data, or item locations are not updated correctly, errors can still occur in the workflow. For that reason, Put-to-Light should be viewed as part of a broader warehouse strategy that includes digital registration, pick lists, and structured operational processes.

In this context, Rackbeat can be relevant as part of the digital foundation supporting inventory, orders, and warehouse flow. It is not necessarily about the light system itself, but about ensuring structure, visibility, and accurate data in the processes that Put-to-Light technology supports.

See how Rackbeat can optimize your workflows

Book a free online meeting and get concrete advice on your current inventory setup, along with practical tips on how to optimize your daily workflows.