Energy Efficient Lighting for Business: Complete Guide

Key Takeaways

• Commercial lighting drives roughly 17% of a building's electricity use, according to the U.S. Department of Energy — making it one of the highest-impact areas to target for energy savings.
  
• Switching to LEDs can cut lighting energy demand by at least 50% while delivering the same or better brightness compared to older bulbs.
  
• Each lighting type serves different commercial needs: LEDs for nearly every application, CFLs for moderate-use areas, T5 fluorescents for warehouses, halogens for specialty/decorative use, HIDs for large outdoor spaces, and smart LEDs for automated environments.
  
• Phased installation minimizes business disruption — schedule work during off-hours, stagger work areas, and tackle high-use spaces first to start seeing savings immediately.
  
• Energy-efficient lighting reduces maintenance and HVAC strain. LEDs produce minimal heat (versus incandescents that lose 90% of energy to heat), lowering cooling costs and extending AC equipment life.
  
• Better lighting boosts workplace performance: studies show up to 30% fewer errors, 4.5% higher productivity, fewer sick days, and improved employee retention with high-quality lighting.

Keep reading to get practical tips, cost-saving strategies and expert advice on choosing the most efficient lighting for your business.

Beyond cost savings, energy-efficient lighting improves the sustainability of your business and brings you closer to earning ENERGY STAR® certification or LEED® credits, both of which can boost the reputation of your brand. Customers, employees and even investors are increasingly looking for organizations that adopt responsible practices to protect the planet. In 2021, PwC reported that 76% of consumers said they would stop buying from businesses that neglect environmental, employee or community well-being.

Though it may be tempting to focus on large expenses, like heating, cooling or equipment upgrades, lighting is a relatively low-cost starting point with a fast return on investment. In many cases, you’ll save enough to make up for the initial costs within a few years, making it one of the smartest places to start making energy upgrades.

• Color temperature is measured in Kelvins (K). This tells you whether the light looks warm and yellow (lower K numbers, around 2700K–3000K) or cool and bluish (higher K numbers, around 5000K–6500K). Here’s a quick guide:
  
• Soft White — 2700K–3000K: Cozy, warm light often used in lounges or residential spaces.
• Warm White — 3000K–4000K: Balanced light good for kitchens, bathrooms, or workspaces.
• Bright White — 4000K–5000K: Crisp, neutral light often used in offices.
• Daylight — 5000K–6500K: Bright, blue-white light that enhances detail, good for reading or task-oriented spaces.

You’ll also notice detailed labels on the packaging or product webpage. The Federal Trade Commission (FTC) mandates “Lighting Facts” labels, which include brightness, estimated yearly energy cost, bulb life, color appearance, energy use, and whether the bulb contains mercury. These labels are designed to make comparisons easier so you can get the most value for your money.

With these basics in mind, you’ll have a clearer picture of what the numbers on a package really mean. Next, we’ll look at the most common types of energy-efficient lighting options and how they compare for business use.

1. LED (Light Emitting Diode)

LEDs have become the standard choice for energy-efficient lighting. They’re extremely efficient, very bright and last much longer than older bulbs.

• Energy Efficiency: 70–110 lumens per watt. Some high-end commercial LED lamps even exceed 200 lm/W, though these figures reflect ideal chip-level performance, not accounting for fixtures or drivers.
• Lifespan: Most are rated for an average of 50,000 to 100,000 hours. LEDs maintain about 96% of their initial brightness longer, compared to fluorescent tubes that may dim to around 85% after just 30,000 hours.
• Heat: Minimal heat output makes them safer to the touch and allows for a cooler work environment.
• Environmental Impact: LEDs don’t contain mercury and require fewer replacements, which reduces waste. They also use less energy, helping lower greenhouse gas emissions when paired with a clean power source.
• Downsides: LEDs can cost slightly more than older types of bulbs upfront, but in most cases, you’ll recover that investment quickly through reduced utility bills.
• Where to Use Them: LEDs can be used in offices, retail spaces, warehouses, outdoor security lighting or anywhere you want maximum savings and minimal maintenance.

2. CFL (Compact Fluorescent Lamp)

CFLs were the first widely available “energy-saving” bulbs before LEDs became dominant. They use less energy than incandescent bulbs but have been largely replaced by LEDs in many commercial settings.

• Energy Efficiency: 50–70 lumens per watt. Uses about 70–80% less energy than incandescent bulbs for the same brightness.
• Lifespan: Typically 6,000 to 15,000 hours — longer than incandescent bulbs but far shorter than LEDs.
• Heat: Produces less heat than incandescent bulbs, but more than LEDs.
• Environmental Impact: Contains small amounts of mercury, which means proper recycling and disposal are required.
• Downsides: Light output can dim over time, and frequent on/off switching reduces lifespan.
• Where to Use Them: CFLs can be a lower-cost option for areas with moderate lighting needs, but many businesses now choose LEDs for better efficiency and longevity.

3. T5 Fluorescent Tubes

T5 fluorescent tubes are slimmer, more efficient versions of older fluorescent lighting. They’re still found in many commercial spaces but are gradually being replaced by LEDs.

• Energy Efficiency: 70–104 lumens per watt, which is similar to LEDs in some cases but less consistent in real-world applications.
• Lifespan: Usually 20,000 to 30,000 hours — better than CFLs, but less than half of most LEDs.
• Heat: Produces more heat than LEDs but less than older fluorescents, which can still affect cooling costs in large facilities.
• Environmental Impact: Like CFLs, they contain mercury and require careful disposal.
• Downsides: Efficiency can drop in extreme temperatures, and ballasts (the devices that regulate current) can fail before the bulb itself.
• Where to Use Them: Common in warehouses, industrial spaces and older office buildings where fixtures are already set up for fluorescents. For newer installations, LEDs are typically a smarter long-term choice.

4. Halogen Bulbs

Halogen bulbs are a more efficient type of incandescent light. They meet older efficiency standards but are quickly being phased out by LEDs.

• Energy Efficiency: Around 16–24 lumens per watt — better than incandescent but far less efficient than CFLs, fluorescents, or LEDs.
• Lifespan: About 2,000–4,000 hours on average.
• Heat: Produce significant heat, which can add to cooling costs.
• Environmental Impact: Contain no mercury but are less efficient, which drives up energy use.
• Downsides: Short lifespan and relatively poor efficiency compared to modern options. As of August 2023, most halogen and incandescent general service lamps have been officially phased out under U.S. efficiency rules.
• Where to Use Them: Specialty applications or decorative fixtures, but not recommended for long-term commercial use.

5. HID (High-Intensity Discharge) Lamps

HID lights (such as metal halide, high-pressure sodium, or mercury vapor lamps) are common in streetlights, stadiums and warehouses. They’re bright but less efficient than modern LEDs.

• Energy Efficiency: Typically 50–100 lumens per watt, depending on type.
• Lifespan: About 10,000–24,000 hours, with brightness that degrades significantly over time.
• Heat: Generate lots of heat, especially in enclosed fixtures.
• Environmental Impact: Some types contain mercury and require special disposal.
• Downsides: Slow warm-up time, poor dimming capability, and frequent maintenance needs.
• Where to Use Them: Large outdoor spaces and industrial facilities, though LEDs are rapidly replacing them.

6. Smart LED Bulbs

Smart bulbs are typically LEDs with built-in Wi-Fi controls. They’re designed more for convenience than raw efficiency gains, but they still offer strong energy savings.

• Energy Efficiency: Same as LEDs (70–110 lumens per watt).
• Lifespan: 25,000–30,000 hours on average, depending on the brand and usage.
• Heat: Minimal heat compared to traditional bulbs.
• Environmental Impact: No mercury; long lifespan reduces waste.
• Downsides: Higher upfront cost, potential connectivity issues in larger facilities.
• Where to Use Them: Offices, retail shops, or conference rooms where automation, dimming, or scheduling can save additional energy.

3. Multiply Steps 1 & 2 to see how much energy you’ll avoid using. 

[Watts Saved Per Light] x [Total Hours ”On”] = [kWh Saved Per Light]

4. Estimate your total savings on yearly energy costs. 

[kWh Saved Per Light] x [Your Electricity Rate: $0.00 / kWh] x [Total # of Lights] = [$0.00 in Annual Energy Savings]

• Type of Fixture
• Wattage
• Location
• # of Hours “On” Per Day
• Too-Dark Areas
• Too-Bright Areas
• Naturally Lit Spaces
• Low-Traffic Areas
• High-Traffic Areas
• Lights That Give Off Noticeable Heat

2. Identify areas with insufficient lighting. 2. Identify areas with insufficient lighting. 

Check your list and flag the lights that need attention first — whether they don’t fit the space, give off poor-quality light or waste energy.

When you evaluate each area, think about the people who will be spending time there and what kind of lighting supports their specific needs for safety, focus and comfort:

• Safety: In stairwells, hallways and especially warehouses, bright, uniform lighting is essential. High-bay LED fixtures or T5 fluorescents are common in warehouses because they provide maximum visibility. For outdoor safety lighting, look for LED floodlights with motion sensors.
  
• Focus: In offices and classrooms, LED panels or LED tubes are a reliable choice. They deliver neutral to cool white light (around 4000K–5000K) that reduces eye strain and helps with concentration.
  
• Health & Comfort: Breakrooms, lounges or wellness areas feel more welcoming with LED bulbs in the warm white range (2700K–3000K) that mimic the cozy look of old incandescent bulbs.
  
• Special Tasks: Retail displays, design studios or workshops often need lighting with a high Color Rendering Index (CRI 90+) to show true colors and fine details. LED track lighting or spotlights work well here because they highlight products or work surfaces clearly.
  

3. Consult a lighting professional. 

While you can handle some upgrades on your own, a certified lighting professional can design a plan tailored to your building. They’ll help you choose the right bulb types, fixture layouts and controls for your space and can flag any code or safety requirements you might miss.

In some cases, your energy provider may be able to help you assess your lighting needs. EPB customers can request a no-cost lighting consultation with our EPB Energy Experts. Schedule now or learn more.

4. Retrofit kits = save more now. Fixture replacements = save more later. 

Don’t want to replace the fixtures you have now? Retrofit kits let you upgrade existing fixtures with more efficient bulbs or LED inserts without tearing everything out. They’re faster and less expensive upfront, making them a good choice if your current fixtures are still in good shape.

Full fixture replacements, on the other hand, cost more initially but often deliver the best long-term performance, reliability, and design flexibility. They also help future-proof your space if you expect growth or want advanced lighting controls.

5. Create an upgrade timeline.

Plan your installation in phases to minimize disruptions. For example, you can schedule upgrades after business hours, tackle one floor at a time or start in non-customer-facing areas before moving into high-traffic spaces.

Installation Tips for Commercial Lighting

Once you’ve chosen the right lighting for your business, the next step is installation. Before you begin, here are a few tips that can save you some headaches, minimize downtime and keep your team safe.

6. Schedule the installation for minimal disruption. 

The best way to avoid slowing down your operations is to plan installation at times when your business is least active. With the right schedule, you can upgrade without interrupting employees or customers.

• Plan for off-hours work. Evenings, weekends or planned downtime keep crews out of the way.
• Stagger work areas. Upgrade one section at a time so the rest of the building stays functional.
• Time it with business cycles. Schedule upgrades during seasonal slowdowns or breaks in production.
• Communicate in advance. Let employees and customers know which areas will be affected and when.

By scheduling strategically and remaining flexible, you can keep the project moving while maintaining business as usual.

7. Coordinate with your team. 

Upgrading lighting is easier when everyone knows what to expect. A little communication up front can prevent frustration later.

• Inform your staff. Share the installation schedule with employees so they can plan around it. Invite them to join in on the excitement by explaining how the lights will benefit them and the company’s budget.
• Alert customers or visitors if needed. For retail or customer-facing spaces, let people know if certain areas will be temporarily closed during the installation.
• Work with managers or department heads. They can help you identify the least disruptive times for their teams.

When everyone is on the same page, the project feels less like an interruption and more like a coordinated upgrade.

8. Prioritize safety. 

Safety is your financial superpower. A safe workplace leads to stronger productivity, fewer injuries, lower insurance costs and higher retention, all of which positively impact your bottom line. According to OSHA, a 2012 study showed a 9.4% reduction in injury claims and saved 26% on workers’ compensation costs — averaging around $355,000 saved per firm over four years — with no negative impact on jobs, sales or firm survival.

• Hire licensed professionals to ensure all work complies with OSHA and local electrical codes.
• Use proper equipment like lifts, harnesses and protective gear when working at height or in tight spaces.
• Shut off power before work begins to eliminate electrical hazards during installation.

By making safety your priority, you’re not just preventing accidents; you’re supporting your employees and protecting your company’s efficiency and financial health.

9. Work with facilities managers.

If your business has a facilities or maintenance team, they can be one of your best resources during installation, since they already know the quirks of your building’s wiring and systems.

• Invite them to help with the project early in the process. Share plans before work begins so they can flag potential issues.
• Check your load capacity. Ensure circuits can handle new fixtures without tripping breakers.
• Coordinate with other systems in the building. Prevent disruptions to HVAC, security or IT systems that might share wiring.

​​Close collaboration with your facilities team ensures your lighting upgrade won’t trip breakers, overload circuits, or accidentally interfere with other building systems like HVAC, security or IT.

10. Use a phased approach for larger facilities. 

For big buildings or businesses on a budget, dividing your installation into phases can make it more manageable. It also lets you start seeing savings sooner.

• Prioritize high-use areas first. Upgrade production floors, offices, or retail spaces where lights run longest.
• Move to secondary areas later. Tackle storage rooms, breakrooms, or low-traffic spaces after critical areas are done.
  
• Spread costs over time. Phasing the project lets you balance upfront expenses with gradual returns.

By tackling your installation in phases, you’ll start cutting energy costs in the busiest areas right away, spread your expenses over time and keep day-to-day operations running smoothly while upgrades are in progress.

2. Lower Maintenance & Labor Costs

Because LEDs are more durable and long-lasting, they cut down on ladder time, replacement tasks, and associated labor. And the reduced need for replacements is a major advantage, especially in commercial and industrial settings.

3. Reduced Heat Means Cooler Spaces

LEDs give off very little heat unlike incandescent bulbs, which convert 90% of energy to heat, or CFLs, which convert about 80% of energy to heat, according to the DOE. This means less thermal load on your HVAC system, helping lower cooling costs and prolong the life of your air conditioning units.

4. Consistent Light Output Over Time

LED lights retain brightness much longer than traditional options. The DOE notes that a typical LED’s useful life is measured until it emits 70% of its original lumen output. That means less frequent planning for lighting upgrades.

Here are a few tips that can help you get the most from your lighting investment:

• Inspect fixtures periodically for flickering, dimming or dust buildup.
• Clean lenses and diffusers to maintain brightness and efficiency.
• Track installation dates and bulb types to anticipate replacement timing and budget proactively.

Combining efficient lighting with simple, regular maintenance practices means your lighting will stay bright longer and keep working harder for your bottom line.

Support Sustainability Certifications

Upgrading to efficient lighting can also move you closer to recognized green certifications — both of which carry real business benefits.

• ENERGY STAR®: Products with this label meet strict efficiency and performance standards set by the EPA. Buildings that earn the ENERGY STAR label also use 35% less energy on average than typical buildings and have lower operating costs. It won’t hurt your brand identity either — 60% of consumers say they prefer buying from environmentally responsible companies.
  
• LEED® Certification: Efficient lighting contributes points toward LEED (Leadership in Energy and Environmental Design), the world’s most widely used green building rating system. A study from the U.S. Green Building Council found that LEED-certified buildings report lower operating costs, higher rental rates and increased property value, making efficiency upgrades a smart long-term investment.

Beyond energy and cost savings, LEED-certified buildings often report improvements in employee satisfaction, morale and retention. In one study, 87% of companies saw increased productivity, 81% saw better retention and 75% noted healthier employees after achieving LEED-certified green retrofits.

By pursuing these certifications, your lighting upgrades can help cut costs, enhance brand reputation, retain talent, and demonstrate authentic environmental leadership.

Build Trust Through Transparency

Don’t keep your sustainability upgrades a secret. Share your lighting improvements with employees and customers in newsletters, signage or annual reports.

People increasingly want to support businesses that take action: 76% of consumers say they would stop buying from companies that neglect environmental or social responsibility, according to PwC. Communicating your progress builds trust, boosts your brand image and helps engage your team in broader sustainability goals.

• Retail Stores — Make merchandise more accessible and aesthetically appealing.
• Design Studios — Make sure graphics, textiles, or prints are accurate.
• Medical or Dental Offices — Support accurate diagnostics.
• Manufacturing or Quality Control Labs — Increase visibility in jobs where precision and consistency are critical.
• Offices and Warehouses — Even in these environments, higher CRI lighting can reduce eye strain and create a clearer, more comfortable environment.

Myth 2: “The upfront costs are too high.”

While efficient lighting can cost more initially, the long-term savings are significant. The DOE estimates that switching your top 5 most-used bulbs to LEDs saves about $225 annually per household. In commercial settings, where lighting often makes up 17% of energy use, savings can scale into the thousands or tens of thousands per year.

LEDs also last 25 times longer than incandescent bulbs, meaning far fewer replacements and lower labor costs over time. In many cases, businesses recoup the upfront costs within just a few years.

Myth 3: “Upgrades are too complex or disruptive.”

Business owners often imagine weeks of downtime, but most upgrades are quick and can be scheduled in phases. Retrofit kits allow you to update existing fixtures without replacing everything, while professional installers can often complete projects after hours to avoid disruption.

Many utilities even provide turnkey rebate programs where approved contractors handle most of the logistics for you. If you’re an EPB customer, you may be able to qualify for rebates on energy-efficient lighting upgrades. Learn More.

In reality, upgrading to energy-efficient lighting is easier, smarter and more cost-effective than most people think. By moving past these myths, businesses can unlock savings, sustainability, and a better workplace environment.

For a light to be considered energy-efficient, it must show measurable performance, consistency and often, smart control features.

How much can a business save with efficient lighting?

Switching to efficient lighting offers substantial savings, since lighting accounts for about 17% of energy costs in U.S. commercial buildings. Many buildings can reduce the energy it takes to power their lights by 30% to 50% while maintaining or even improving lighting quality. And you don’t have to replace every bulb to save — according to Energy Saver, a retrofit that replaces five bulbs with LEDs or CFLs can save up to $200, based on real-world utility data.

Is it better to retrofit or replace lighting fixtures?

It depends on your specific needs:

• Retrofitting retains your existing fixtures and is often faster and less expensive upfront. It’s a great option when fixtures are still in good condition or when work needs to be done quickly.
• Replacing fixtures offers better long-term performance, greater control options and design flexibility. Though initially more expensive, this option often pays off through improved lighting quality, reduced maintenance and future-proof upgrades.

Think retrofit for speed and cost, or replacement for durability and control, based on your budget and facility needs.

Are there rebates or incentives available for lighting upgrades?

Yes — many utility companies and government programs offer financial incentives that significantly offset upgrade costs. Check with your state’s energy department or ask your energy provider. If you’re an EPB customer, you may be able to offset the costs of your commercial lighting upgrades with rebates from EPB and TVA EnergyRight®. Learn More.

Does energy-efficient lighting affect employee productivity?

Yes. High-quality lighting has been shown to improve focus, reduce eye strain, and boost overall work performance.

• Information from Falcon cites that workspaces with LED lighting experienced up to 30% fewer visual mistakes.
• According to TVA, comfortable, well-lit workspaces can deliver a 10% increase in productivity.
• PMC reported that access to natural daylight and high-CRI lighting improves employee alertness, satisfaction and comfort in the workplace.

For businesses, this means efficient lighting isn’t just an energy-saver; it’s a performance booster that creates a safer, healthier, and more productive workplace.

The first step is simple: conduct a lighting audit or schedule a consultation with a certified professional who can recommend the best upgrade path for your space. If you’re an EPB customer, you can request a no-cost lighting consultation with our EPB Energy Experts or learn how to offset your upfront costs with incentives from EPB and TVA EnergyRight®. Learn More.

Lighting upgrades aren’t just another expense. They’re an investment that pays for itself in cost savings, operational efficiency and long-term brand reputation.