Introduction

Walk into any well run warehouse and you will notice something immediately. The space feels organized, safe, and easy to navigate. Now walk into a warehouse with poor lighting. The mood changes. Workers squint. Forklift operators slow down. Picking errors climb. Everything feels harder than it should be.

The difference between these two environments often comes down to one thing. It is not the racking system. It is not the software. It is the quality of the warehouse aisle lighting.

For decades, warehouse managers relied on metal halide and fluorescent fixtures. These older technologies got the job done, but they came with serious drawbacks. They consumed massive amounts of energy. They burned out quickly. They required frequent maintenance, which meant sending workers up on lifts to replace lamps and ballasts. And even when they worked, the light quality was often uneven. Bright spots on the floor. Dark shadows between racks. A constant struggle to see labels and barcodes.

LED technology changed everything. Today, warehouse aisle LED lights deliver more light with less power. They last for years instead of months. They can be controlled with sensors and dimming systems. They can be aimed precisely where the light is needed most.

You will find all the necessary information in this guide, which will explain some important points about energy-efficient LED lighting. Regardless of whether you have a modest storage unit or a big distribution facility, this information will help you reach a smart decision about lighting your warehouse or another property.

Why Upgrade to LED for Warehouse Aisles?

Let us start with the most obvious reason. Energy savings.

Traditional Warehouse Lighting is expensive to operate. A single 400 watt metal halide fixture might draw 450 watts or more once you account for ballast losses. Multiply that by dozens or hundreds of fixtures running twelve hours a day, and the utility bill adds up fast. LED fixtures produce the same amount of light while using fifty to seventy percent less energy. That is not a small difference. For many facilities, the energy savings alone can pay for the upgrade in two to three years.

Maintenance is also a part of the energy picture. For example, a lamp at the end of an aisle is hard to reach. An employee has to take a lift to get it. The lift stops the aisle traffic. The part is swapped out, and everything is replaced to its original position. This all takes time. The longer distances add the potential for an injury. LEDs last for 50,000 hours, which is really really long. Distribution centers can run 24/7. LED lights give a consistent runtime and steady uptime, and efficiency.

LED lights can provide quality illumination. Old lighting technologies can’t. Flickering lights are distracting. And, when lights have a change in color temperature, it can actually slow down the workforce. LED lights can instantly turn on in cold storage. LEDs have a longer runtime than older lighting tech. Older lighting techs can’t instantaneously change brightness. LEDs can be dimmed, or switched off if an aisle is unoccupied. LEDs can be adjusted with smart systems to have their brightness changed according to natural lighting.

And, finally, there is safety. Unsafe lighting increases accidents. Forklifts collide with rack units. People trip over pallets. Items fall from height because someone did not notice a broken box. Efficient warehouse aisle lighting decreases these hazards.

Key Factors for Choosing the Best Aisle Lighting

LED fixtures vary a lot. You can not just pick the lowest price and assume it will work well. Your aisles have their own needs, and the fixture has to match them.

Lumen Output and Efficacy

Lumens show the total light output of a fixture. Efficacy shows how well the fixture converts watts to lumens. A higher efficacy means you pay less to achieve the same lumens. For home use a good starting point would be a unit that is at least 130 lumens per watt. The better models reach over 150 lumens per watt.

Beam Angles and Optics

Here is where things get exciting when it comes to aisle lighting. Beam angle affects the spread of light. A narrow beam focuses light into a narrower spread. A wide beam spread has light spreading wider.

Narrow beams are usually ideal for narrow aisles that have high racks. Narrow beam angles usually range from fifteen to thirty degrees. The spread of light goes through the length of the aisle and the vertical side faces of the racks. Wider aisles may require medium beam angles ranging from sixty to ninety degrees.

Some fixtures offer asymmetric lenses. These are designed specifically for rack aisle lighting. They throw more light to the sides and less straight down. This illuminates the products on the shelves rather than wasting light on the floor.

Color Temperature

The color temperature is measured in Kelvin. Many fixtures in a warehouse are in the 4000K to 5000K range. Color temperatures this high result in a more neutral white light and help keep the workers alert. If used in the right application, lower color temperatures of around 3000K can work. However, many people think that lower color temperatures make a space look dim even if that is not the case.

IP and IK Ratings

Warehouses are not the cleanest or safest of environments. Ip ratings show how well a product is guarded against dust and moisture. Ik ratings show how well a product is protected against impact. In general for most warehouse environments, a product would need to have an Ip of 54 or greater and an Ik of 08 or greater. For food processing and cold storage warehouses, a higher rating may be necessary.

The Top LED Fixture Types for Warehouse Aisles

For aisle lighting, there are three basic types of LED fixtures that get the job done. The “Pros” and “Cons” of each are discussed below.

Linear High Bays

Linear High Bays are long and skinny, like the name suggests, and are used for warehouse lighting to illuminate large, wide open spaces. Unlike some other fixture types, high bays are relatively easy to install and maintain.

Round High Bays (UFO Style)

UFO style high bays are circular fixtures that provide a concentrated light source. Because of their shape, they are best used when light needs to be pushed down from a high ceiling to a narrow aisle. To prevent light from spilling into adjacent aisles, an appropriate lens or reflector should be used to concentrate the light to a narrow beam. Also, because the heat is evenly distributed, this style of light has a longer life span.

Linear Aisle Lights (Rack Mounted)

These lights mount directly to the face of the rack and are designed to provide light to the shelves from top to bottom. This style eliminates the cave effect that occurs when only top light is provided. These lights are particularly helpful for narrow aisle warehouses and AS/RS (automated storage and retrieval systems).

Layout and Design: Achieving the Right Lux Levels

Choosing the right fixture is only half the battle. You also need to place them correctly.

Understanding Foot Candles and Lux

Light levels are measured in foot candles or lux. One foot candle equals roughly ten lux. The Illuminating Engineering Society provides guidelines for different warehouse tasks.

Generally speaking, 10 to 20 foot candles is adequate for general movement and transport. Between 20 and 30 foot candles is best for picking and packing. Quality control and inspection may require 50 foot candles or more.

Vertical Versus Horizontal Illumination

One thing many people overlook is that in warehouse aisles, the most important surface is not the floor. It is the vertical surface of the racking. If you only light the floor, what is above the lower shelves, and all the upper shelves, remain in the shadow. Workers cannot read labels and inspect product, etc.

This is why rack aisle lighting design focuses on vertical illumination. You want fixtures that throw light onto the shelves, not just the ground. Asymmetric lenses and rack mounted fixtures are your best tools for achieving this.

Spacing and Mounting Height

The spacing between fixtures and their height of mounting impact how evenly light is dispersed. If fixtures are spaced too far apart, you get dark areas. If they are spaced too closely together, you waste energy and light. The best way to find an ideal configuration is by using simulation software as part of a professional lighting layout. As a general rule of thumb, fixtures should be spaced so that mounting height is no less than 50% of the distance between the fixtures.

Top Recommendations

The best fixture for your facility depends on your specific needs. Here are some general recommendations based on common scenarios.

A typical situation for higher ceiling applications (30' and above) is to use round UFO high bays with a narrow beam angle. These can be aimed in the specific area that needs it the most.

For standard warehouses with ceilings between fifteen and thirty feet, linear high bays provide excellent coverage and easy installation.

For narrow aisles with tall racking, rack mounted linear lights or high bay fixtures with asymmetric optics will give you the best vertical illumination.

For a warehouse or distribution center, lighting needs to change with the work. Pick lights that already include motion sensors and dimming. Then the brightness can shift when people are present, and it can be set for different times of the day.

Installation Tips for Warehouse Aisles

Upgrading your lighting is a process, not a simple purchase. The tips below will help ease that process.

To begin, you must decide if you are retrofitting existing lights or starting new. Retrofitting can be cheaper because you don't have to pay for new wiring. But, you could be limited to what kind of fixtures you can use. Starting new gives you a lot of freedom, but costs more upfront.

Second, safety must come first during the installation process. Lifts will be needed for high ceiling fixtures. Plan your work to prevent interruptions. You may need to do your work during off-hours, like after the business closes or during a slow shift.

Next, consider how you will be controlling the lighting. There are many controls that can be utilized to enhance and reduce energy use. But, if you want to utilize these controls, you must include them in your initial plan.

Last, verify your plans meet local codes. Check with your AHJ before beginning.

Frequently Asked Questions

What color temperature is best for warehouse picking?

Color temperatures of 4000K and 5000K are common in most warehouses. These temperatures produce a crisp, clean light that help warehouse workers read labels and barcodes. These color temperatures also help keep workers alert during long shifts.

How many LED high bays do I need for my aisle?

The answer to this question is not always straightforward and depends on many factors including height of the ceiling, width of the aisle, height of the rack, and the light levels desired. A lighting professional can run a simulation to help provide the answer. As a very general rule, in a standard warehouse, every 10-15 feet along an aisle would be a good place to position a high bay light.

Are LED lights dimmable in warehouses?

Yes, many LED fixtures are dimmable. Empty aisles and available daylight are two instances when light levels can be reduced. Dimming LED fixtures not only provides energy savings, but also prolongs the life of the fixture.

What is the lifespan of industrial LED lights?

Most quality LED fixtures are rated for fifty thousand hours or more. At twelve hours per day, that is over eleven years of operation. Actual lifespan depends on operating conditions and fixture quality.

Can I set up the LED lighting on my own?

If you are not a seasoned electrical pro, it may be worth bringing in an electrician. Installing lights in a warehouse usually requires complex wiring and ceilings that are much taller than you are used to.

Conclusion

Upgrading your warehouse aisle lighting can greatly benefit your company by reducing your energy costs, maintenance needs and increasing safety and productivity. Along with these benefits, LED technology allows for a good return on investment.

The most crucial aspect of your LED lighting installation project is the selection of appropriate fixtures. Before making the final decision, consider issues such as ceiling height and racks layout as well as determine what sort of lighting requirement you have.

If you are ready to take the next step, we can help. Our team specializes in warehouse and distribution center lighting. We offer free lighting layouts, product recommendations, and expert guidance. Contact us today to see how much you could save with the right warehouse aisle LED lights.