In 2026, a commercial LED lighting retrofit is less about “new lights” and more about operational control: energy exposure, maintenance risk, forklift visibility, and the quality of the working environment. That is exactly why lighting proposals can be hard to evaluate. Different contractors may present different fixture brands, different models of the same space, different assumptions on operating hours, and different definitions of “savings.”

This guide is written for warehouse facility managers who need a disciplined way to compare proposals and make a confident commercial lighting upgrade decision. The structure mirrors the areas that matter most in a real facility manager vendor comparison: Fixture Quality & Performance, Proposed Design, Energy & Financial Impact, and Contractor Provided Services.

Start with the baseline: audit your existing lighting system

Before making any final decisions your lighting upgrade, it’s essential you (or your contractor) has performed a detailed audit of your existing lighting system. This includes:

• The layout of your system and facility (fixture placements, ceiling heights, aisle width, racking layout, any obstructions);
• Your existing lighting technology, including fixture types, wattages, and any controls in place; and
• Recorded light levels in each area (measured in foot candles);

This assessment allows you to establish a baseline for your current energy usage, how far below (or above) your existing light levels are compared to IES recommended standards, and how your upgrade can be designed to minimize shadows and glares.

Our team begins each project with a complimentary on-site audit to help you confidently better understand if a lighting upgrade is worth pursuing for your facility.

See how our team approaches audits here »

Key considerations when evaluating lighting proposals

1) Fixture Quality & Performance (what you’re installing, and how it will hold up)

This section is your risk filter. In a warehouse LED lighting retrofit, you’re buying a system that has to perform for years in heat, dust, vibration, and long run times — while still qualifying for incentives and meeting safety expectations.

How these criteria tie back to the value of your investment:

• Minimizing risk: Warranty failures, unplanned maintenance costs, rebate disqualification
• Minimizing costs: Fixtures that degrade fast cost more over a 10-year horizon than the upfront delta.

Key Criteria:

• DLC listed: DLC listing (Design Lights Consortium) confirms the fixture meets independent efficiency criteria and is commonly required for utility rebate eligibility in the United States.
• UL listed: UL listing (Underwriters Laboratories) is an independent safety certification expected for commercial workplace use. It reduces uncertainty around fire and electrical safety compliance for installed luminaires. As a baseline requirement, specify UL listed fixtures with a visible mark on the product.
• Rated life (L70) with ambient temperature stated: L70 is the time it takes for a luminaire to depreciate to 70% of its initial lumen output (L70/L80/L90 are different thresholds for lumen maintenance). The critical nuance is that rated life is temperature dependent: LEDs and drivers degrade faster as ambient temperature increases, so a rated life without a stated ambient test condition is incomplete. For proposal evaluation, we recommend a minimum standard of L70 ≥ 150,000 hours with the ambient temperature clearly stated (for example, @ 25°C). For context, L70 (25°C) @ 50,000 hours means the luminaire retains 70% of initial output at 50,000 hours under a 25°C ambient assumption. The U.S. Department of Energy has noted that L70 is roughly where human observers begin to notice a meaningful reduction in light output—so it is a practical “useful life” marker in working environments.
• Fixture warranty (and what it covers): A warranty is not only a marketing statement; it is a proxy for the manufacturer’s confidence in drivers, thermal design, and component selection. For warehouse applications, we recommend requiring a minimum 10-year warranty.
• Manufacturer longevity: This is especially important for making sure you are getting serviceable warranties — you want to make sure your contractor will be in business to honor it! Warehouse facilities with long-operating hours will test fixture durability in ways the spec sheet may not hold up to. And as the LED lighting fixture landscape becomes filled with new low-cost entrants, purchasing product from a well-established vendor will reduce risk if any issues or failures were to come up.
• Efficacy (lumens per watt): Efficacy is a key criteria item used to assess energy efficiency — how much energy is consumed to reach your desired light levels? For warehouse facilities, we recommend setting a practical standard that the fixture efficacy ≥ 150 LPW.
• Color temperature (CCT): Warehouses frequently standardize to cooler white light for acuity and consistency, especially in industrial and QC environments. A strong default is 5000K, with deviations documented by site-specific rationale. Consistency matters; avoid mixing CCTs across the same operational zone.
• Ambient temperature rating (50°C): Warehouse ceiling conditions — especially near the roof deck in summer — can exceed typical 25°C laboratory assumptions. Fixtures not rated for high ambient temperatures can experience accelerated light degradation and performance issues, shortening useful life well below published L70 values. For many U.S. warehouse environments, we recommend implementing fixtures rated to operate at 50°C ambient (or higher).

2) Proposed Design (proof the promised results are engineered, not guessed)

A strong commercial LED lighting retrofit proposal is transparent about how the outcome was engineered. Design quality is where contractors separate: one proposal may “feel” convincing while another is verifiable.

How these criteria tie back to your investment:

• Minimizing risk: OSHA/safety liability, worker comp exposure, productivity loss in poorly lit pick zones.
• Saving you time: Redesigns and change orders mid-install kill schedules.

Key Criteria:

• Point-by-point photometrics for your specific site: Require point-by-point photometrics generated from a lighting model for your facility, not a generic template. The design should demonstrate uniformity and worst-case points – not only averages.
• Shadowing and obstructions accounted for: Racking, mezzanines, conveyors, and equipment change delivered light dramatically. Any design that models the warehouse as an empty box overstates results. Require evidence that the design accounts for site-specific obstructions and shadowing and that the racking layout was incorporated before fixture quantities and locations were finalized.
• 3D model and visual validation: A 3D model is a validation tool in complex facilities. It allows facility teams to confirm fixture placement relative to racking, spot design disconnects early, and reduce surprises during installation.
• Light levels aligned to IES and industry standards: Warehouse lighting is ultimately about safety and performance. The Illuminating Engineering Society (IES) publishes recommended light levels by area, and a credible proposal should either meet or exceed those recommendations or clearly explain why a different target is appropriate. As an evaluation standard, require that proposed light levels are aligned to IES/industry recommendations by functional area (aisles, open storage, packing, docks), with uniformity addressed—not just average levels.
• Emergency lighting and sign lighting scope clarity: During retrofit planning, egress compliance can be inadvertently degraded if emergency circuits and fixture locations aren’t addressed early. Require the contractor to identify existing egress fixtures during the audit and replace with emergency battery backup (EBB) fixtures in the same locations. Separately, confirm whether exit and wayfinding sign lighting is in scope and documented, so there is no ambiguity mid-install.
• Multiple design options (so you can choose the best ROI, not a single outcome): In 2026, proposals should not be take-it-or-leave-it. Controls strategies, fixture tiers, and scope decisions materially impact incentives, payback, and long-term performance. Having a contractor that provides you with multiple upgrade options not only helps you asses trade-offs, but signals they are working to find the best solution for your needs, goals and budget.

3) Energy & Financial Impact (savings you can audit)

Energy numbers are only meaningful when they are traceable to agreed inputs. The purpose of this section is to ensure every bidder is calculating from the same reality, so you can compare operating cost reduction projections without being misled by assumptions.

How these criteria tie back to your investment:

• Predictable returns: Traceable savings = bankable ROI, not just a contractor’s estimate.
• Optimal timing and maximized rebates: Budget cycle alignment, ensure you meet key rebate timelines and requirements.

Key Criteria:

• Baseline annual kWh: Baseline energy should be calculated using a transparent method: fixture quantity × fixture wattage × annual operating hours, adjusted for any existing controls. For proposal evaluations, require that the baseline method is documented and consistent with site-provided data.
• Proposed annual kWh: Proposed kWh should reflect actual fixture wattages and the controls strategy. Because controls savings are behavioral and operational, it is reasonable — and often more honest — to present scenario ranges (conservative/expected/aggressive) rather than a single point estimate.
• Rate-of-power consistency: Once baseline and proposed kWh are established, savings are straightforward math: kWh delta and percentage reduction. The important variable to look at is the rate of power used. To keep comparisons apples-to-apples, make sure your are assessing each proposed energy savings using the same rate of power. Our team at PEC typically looks at the blended rate provided by your utility provider (energy rate plus taxes/fees/riders).
• Utility incentives and maintenance savings: Incentives and rebates capture can vary greatly depending on how the upgrade is design. Programs will often allocate more funds for projects meeting certain criteria (i.g. incorporating advanced controls). Understand what each contractor is collecting for your project so your know if any funds are being left on the table (and can ask why). In addition, experienced contractors may provide you with estimated maintenance savings, based on the expected lifespan of your old lighting technology.
• Project cost, net cost, and payback: Evaluate gross cost, net cost after incentives, and simple payback — but keep the decision grounded in total cost of ownership. A proposal that is slightly higher upfront may outperform over time if it reduces failure risk, extends useful life, and improves controllability.

4) Contractor Provided Services

Even the best proposals can underperform if execution is rushed, the facility is not mapped correctly, or post-install support is vague. This section is about reducing implementation risk and protecting your operations after commissioning.

How these criteria tie back to your investment:

• Money: No surprise costs.
• Risk: No compliance gaps.
• Time: No project delays from scope ambiguity.

Key Criteria:

• On-site evaluation (not a desk estimate): Require a true on-site evaluation. A desk estimate cannot capture existing light levels, voltage realities, racking shadowing, emergency circuits, or the operational constraints that determine whether an install is safe and efficient.
• Facility map and documentation quality: A credible contractor should produce a facility map that identifies existing fixtures, egress pathways, and racking layout, because that map becomes the basis for design and itemized scope. This is also where scope clarity is created before procurement.
• Implementation plan and coordination: Warehouses do not stop operating for lighting projects. Require a detailed implementation plan that addresses shift coordination, aisle closures, safety plan, staging, commissioning steps, and how disruptions will be minimized.
• Incentive paperwork ownership: Utility rebates often require pre-approvals, inspections, and precise documentation. Look for a contractor that will handle incentive paperwork end-to-end, with a documented timeline and clear responsibilities for site signatures and inspections.
• Warranty response process (service-level clarity): A warranty is only as useful as the process behind it. Require a written warranty response process that defines response times, replacement logistics, labor expectations, and escalation paths, so failures do not become open-ended operational interruptions.
• Relevant work references: Lighting projects are highly contextual. Ask your contractor if they have any relevant case studies or project references to give you reassurance that they have a track record of success completing projects in facilities like yours.

Our Experience with Warehouse Lighting

Our team at Pacific Energy Concepts (PEC) has been executing on turnkey LED lighting retrofits since 2009. We have supported over 5,000 clients and 8,000 LED lighting retrofits across North America — ranging from single-site projects to portfolio-wide LED rollout initiatives.

Check out some of our warehousing and distribution case studies:

• IKEA: Portfolio Partner | +80 Projects
• Ace Hardware: Distribution Center | Moxee, WA
• HD Supply: Distribution Center | City of Industry, CA
• Daltile: Portfolio Partner | 36 Projects

Download a Free Template: Warehouse Lighting Proposal Comparison Workbook

If you are actively collecting bids, the fastest way to improve decision quality is to compare every contractor through the same scorecard. Download the Warehouse Lighting Proposal Comparison Template and use it to evaluate fixture quality, fixture performance, proposed design, energy and financial impact, and contractor provided services side-by-side.