Changing every light fixture in a commercial building is not only a costly and disruptive process but also most of the time it is not necessary. Retrofitting however allows you to keep the light fixtures you currently have and change only the interior parts for LED components. This way you get modern performance without having to remove the ceiling or rewiring the entire floor.
Warehouse office retail, and industrial spaces still using fluorescent tubes, metal halides, or HID lamps can greatly benefit from this compromise solution. You will enjoy the majority of the advantages of a fully LED setup at a small portion of the cost and downtime. Besides, in many instances, the payback time is so short that the finance department almost immediately stops opposing the idea.
However, retrofit may not be the correct solution in all cases. For example, when fixtures are too old or the current layout was not intended for the light distribution of LEDs. But if the circumstances are favorable, the advantages can accumulate very fast.
Energy Savings That Actually Show Up on the Bill
The primary motivator for many facility managers who consider LED retrofits is energy consumption. A regular T8 fluorescent tube consumes approximately 32 watts. A corresponding LED tube emits the same or even better light output while drawing only about 15 watts. Run over hundreds or thousands of fixtures for 10 to 16 hours a day, and this difference becomes a substantial savings.
The real headline of the high-bay fixtures scenario is the remarkable change that the numbers reveal. A 400-watt metal halide lamp, which is a popular choice for lighting in warehouses and manufacturing plants, can be substituted with an LED producing the same amount of light at approximately 150 watts. When you take into account the ballast losses that you would also be removing, the energy reductions can range from 60 to 75 percent quite easily. The thing people fail to realize is the knock-on effect. If you use lamps of a lower wattage, you are generating less heat from the light itself, which means the air conditioning systems will not have to work as hard to cool the space. In very large buildings, this indirect saving can be an additional 5 to 10 percent on top of the direct lighting reduction.
Fewer Maintenance Headaches and Longer Service Life
Fluorescent tubes used for commercial purposes usually have a lifespan of 15,000 to 20,000 hours. Metal halides are even less efficient and most of the time, they lose a large part of their light output long before they completely stop working. Good quality LED retrofit kits are designed for 50,000 to 100,000 hours of usage, which in a usual commercial environment means 10 to 15 years before you have to worry about them.
It is a game-changer for a person running a facility. Scheduled relamping which is the practice of replacing all the bulbs at a predetermined time only to avoid the failure of a few bulbs at different times, will be almost completely unnecessary. Also, equipment like lift rentals, electricians’ visits, and the staff members physically changing the light tubes in the ceiling grid would be completely eliminated as regular expenses.
There is also the aspect of cold-weather performance. Fluorescent lights do not perform well in cold environments like unheated warehouses and loading docks; they usually take several minutes to get to full brightness or may not even be able to strike when it is very cold. LEDs light up immediately regardless of the temperature, and this is important in places like refrigerated storage, parking garages, and northern areas more than people generally think.
Better Light Quality Changes How Spaces Feel
Generally, the color rendering factor is omitted in a business case, which should be rectified. The color rendering of old fluorescent and HID lamps is often quite poor. In retail, products shall appear visually desecrated. In offices, work surfaces shall appear visually dull. In addition small safety-critical details might be difficult to distinguish in industrial environments.
Nowadays, LED retrofit products mostly have a color rendering index value of 80 and over with the highest quality products reaching 90+. Colors’ appearance is truthful, the reading of the text is facilitated, and the general appearance of a space is clean and welcoming. After some retail stores’ illumination was upgraded through retrofit, the number of sales was significantly higher simply because their merchandise finally looked the way people expected it to.
Another benefit is having some say in the color temperature. A warehouse, for instance, might get the advantage of a cooler 5000K type of light that is conducive to alertness of workers, while the shots of a hotel lobby or a restaurant often come better on 3000K or 3500K. In the case of retrofits, the light temperature is picked to fit the space rather than to match that of the original lamps.
Smart Controls and Flexibility Going Forward
Most LED retrofit kits will work with dimming, occupancy sensors, daylight harvesting, and even networked control systems. Many older fluorescent fixtures either did not dim at all or dimmed very poorly, flickering and buzzing throughout the process. Changing to LED introduces you to the idea of controls which can lower your energy usage even further, sometimes by an additional 20 to 40 percent, besides the initial savings.
The presence of an occupancy sensor in warehouse aisles will mean that lighting at full output is only kept on for the time someone is actually present. The daylight sensors in office areas near windows permit the fixtures to dim when sufficient natural light is present. These lighting controls have become quite common features and they can be added to a retrofit project without much extra complexity.
If you’re sourcing components for a larger project, it helps to work with a supplier that understands the practical side of commercial installations rather than just selling bulbs. Providers offering full-scale commercial lighting solutions can usually spec compatible drivers, advise on photometric distribution, and flag compatibility issues before they turn into surprises on install day.
Rebates, Incentives, and Faster Payback
Several utility companies in North America and Europe have rebate programs designed to support LED retrofits. In fact, they often pay 20 to 50 percent of project costs upfront. The reason for these initiatives is that reducing commercial lighting load is one of the most cost-effective solutions to meeting efficiency mandates. That’s why these utilities are very keen on giving out money.
Tax benefits can be added on top of these rebates. In the US, for example, people who adopt the accelerated depreciation method under Section 179 and also take advantage of several deductions available for energy-efficient commercial buildings will find the payback period significantly reduced. Also, depending on the location, other local incentives might be available.
In most cases, a retrofit project will return the initial investment between one and three years, and pretty much all of them manage this in less than two years when rebates are taken into consideration. This timeframe, from a financial perspective, is extremely short when compared to other capital projects that a facility manager might have to defend. Once the payback period is over, every year, a lessening of consumption and maintenance will result in direct profit.
The Case for Acting Sooner Rather Than Later
Retrofitting is no longer an upgrade that is just a fad. It is the standard option for any commercial building that still has legacy lighting, plus the economics have only improved with the LED component prices declining. The main reason why most facility managers are hesitant is usually due to inertia rather than any real disagreement with the method.
You might say the current fixtures are okay at the moment. However, they not only consume more electricity than necessary, but also produce light of lesser quality, and operate on a self-scheduling system for replacement that you will end up paying for anyway. A good retrofit plan can anticipate these problems, secure a decade or more of lower operating costs, and significantly improve the working environment. Considering the incentives that are available and the payback periods involved, delaying the decision to do a retrofit seldom remains convincing after a thorough examination.
