Lighting Design Services

This is a question we take seriously, because the answer determines whether we are actually useful to you or just another coordination burden. Our deliverables are built to integrate directly into your documentation set. We work from the same project files your team is already producing: site plan PDFs or CAD files for new construction, existing conditions plans for renovation work. 

We do not require a separate intake process or proprietary file formats. We produce photometric drawings, fixture cut sheets, code compliance documentation, and specifications written to performance parameters, all formatted to support your permitting submissions and internal approval processes without requiring translation or supplemental engineering work on your end.         

We also understand where we fit in the project sequence and where we do not. OSL is a subcontracted design resource, not a competing design authority. We produce the lighting design and specification package, and we do it in a way that extends what your firm can offer clients rather than creating friction in your process. The engineers and architects who build us into their standard practice find that the lighting conversation stops being a loose end and starts being a resolved asset from day one.     

Coordination during design development is direct. You work with our design team and, where sign-and-seal is required, our licensed electrical engineers. We are responsive to revision requests, addenda cycles, and value engineering conversations. If a jurisdiction requires a specific licensed engineer of record on the lighting documents, we can discuss how to structure that engagement cleanly.             

For firms with multiple active projects, we can also develop a master specification framework that adapts to individual site conditions while holding consistent performance standards. That means your next project with similar lighting requirements does not start from a blank page.

The research on this is more direct than most property owners expect, and the commercial consequences are concrete enough to belong in a capital planning conversation. The after-dark character of a commercial property is a leasing and reputation factor that operates before any marketing message reaches a prospective tenant or customer. Consistent, well-specified outdoor lighting signals investment and operational care. 

Inconsistent lighting, mismatched color temperatures, dark zones at perimeter areas, aging fixtures with visible depreciation, signals the opposite. Institutional tenants conducting ESG and green-lease due diligence now review outdoor lighting quality as part of that process.

The consumer behavior data is equally direct. Women control or influence 85 percent of consumer spending. Research shows they are 86 percent more likely to bypass a dark parking area for a better-lit alternative. A site that feels safe after dark draws more traffic, supports stronger tenant retention, and commands more competitive lease terms than one that does not. That perception is not incidental to the design. It is an outcome the design either produces or fails to produce.

The crime data reinforces the same conclusion from a different direction. The U.S. Department of Justice identifies parking lots as the third most common location for crime, accounting for 4 to 6 percent of all crimes and 7.3 percent of violent crimes. Well-lit parking lots experience an average of 27 percent fewer car break-ins and 38 percent less theft and other crime than poorly lit ones. Reduced crime incidence is a direct input to property value, tenant satisfaction, and insurance cost.

The financial case compounds across a multi-site portfolio. Energy savings from a properly specified LED installation run 50 to 75 percent over legacy metal halide or high-pressure sodium systems. Fixture counts reduced through photometric modeling lower both upfront capital cost and long-term maintenance expense. And the specification-grade documentation that comes out of a professional design process protects the owner's position in ways that a catalog proposal simply cannot.

A well-designed outdoor lighting installation is not a code compliance exercise. It is a capital asset decision with measurable consequences for customer traffic, tenant retention, lease terms, and the long-term defensibility of the property.

When an incident occurs on a commercial property, whether a slip-and-fall, a vehicle collision, or an assault in a parking field, one of the first things opposing counsel establishes is whether the property had documented photometric evidence that the site met applicable local code requirements at the time of the event.

The absence of that documentation does not automatically prove inadequacy. But it removes the ability to prove adequacy. And in premises liability litigation, that distinction matters considerably.

Engineering-grade photometric design built to local code, with documentation to support it, is the most defensible position a property owner can establish before a problem occurs. It demonstrates that the lighting decision was made deliberately, based on engineering analysis, and that the result was verified against the applicable standard before construction began.

There is a specific technical dimension to this worth understanding. The industry standard specifies not just average footcandle levels but also uniformity ratios, the relationship between the brightest and darkest points on the same surface. The maximum uniformity ratio for general parking areas is 4:1, and 3:1 for higher-security applications. A design that meets its average footcandle target while failing its uniformity ratio is not compliant. Dark zones at perimeter areas, pedestrian crossings, and between poles are exactly where incidents are most likely to happen, and they are what a photometric analysis is designed to identify and eliminate.

OSL's process models both average and minimum values across every zone before any fixture is specified, and produces light trespass calculations at property lines as a standard part of the deliverable. That documentation supports permit applications, demonstrates code conformance, and opens conversations with risk managers, insurance carriers, and general counsel that a fixture-count proposal cannot.

Manufacturing-agnostic means we are not affiliated with, incentivized by, or limited to any single fixture manufacturer or product line. We maintain direct relationships with more than seven leading outdoor lighting manufacturers, and our specifications are written to performance parameters rather than product identifiers. That means the specification belongs to the project, not to any vendor.

Most outdoor lighting proposals you receive are produced by manufacturers' representatives or distributors whose business model depends on selling a specific product line. Their design process, whether they call it a design or not, starts with the fixture they carry and works backward to justify it. The site gets what the vendor sells, not what the site actually requires.

Our process runs in the opposite direction. We model what the site requires zone by zone, test fixture options across multiple manufacturers, and select the product that performs best for the specific conditions of that site. When a premium fixture is the right call for longevity and performance, we specify it. When an equivalent product at a lower cost meets the design requirements just as well, we say so.

That independence has two practical consequences for our clients. First, the design produces better performance outcomes because fixture selection is driven by engineering requirements rather than inventory. Second, because our specifications are written to performance parameters rather than specific SKUs, they enable competitive bidding and preserve flexibility if product availability changes between design and procurement. You are not locked into a single source.

                After 25 years of building manufacturer relationships across the industry, we know the product landscape thoroughly. That knowledge is what makes manufacturer-agnostic specification genuinely useful rather than just a positioning statement.

It does not have to conflict, and getting that balance right is one of the more technically demanding parts of what we do. OSL fully supports what the Dark Sky movement is working toward. We commend the work of DarkSky International, the leading global authority on light pollution and the organization behind the DarkSky Approved fixture certification program. 

Reducing light pollution, controlling light trespass onto adjacent properties, and protecting the nocturnal environment are legitimate design objectives, not regulatory obstacles to work around.

The practical expression of that commitment is integrating full-cutoff optics into the specification: outdoor fixtures that direct all emitted light below the horizontal plane, eliminating upward waste and focusing illumination where it is actually needed. Full-cutoff design delivers more usable light per watt to the task surface, which means it simultaneously improves energy efficiency, reduces glare, and eliminates the upward light waste that triggers Dark Sky ordinance violations. In most cases a properly designed full-cutoff installation performs better on every measurable dimension.

The place where Dark Sky compliance requires careful navigation is uniformity. A design that achieves Dark Sky conformance by simply reducing light levels without attention to uniformity ratios and zone-specific requirements can create exactly the dark zones that represent a safety and liability risk. Dimmer is not better if the result is a perimeter zone or pedestrian crossing that falls below the maintained minimum.

OSL's approach is to achieve Dark Sky conformance through fixture selection, optic design, and photometric modeling, not through blanket light-level reduction. Light trespass calculations at property lines are a standard part of our photometric process, providing documentation for permit applications in jurisdictions with adopted Dark Sky ordinances and demonstrating code conformance before construction begins. For projects in Dark Sky-designated areas or municipalities with CCT restrictions, we build those requirements into the specification from the start.

Yes, our electrical engineers are licensed across the lower 48 states, and sign-and-seal capability is part of what we bring to projects that require it.

Code compliance in outdoor lighting is more jurisdiction-specific than most project teams anticipate until they encounter it. The governing standard for parking facility and roadway lighting is ANSI/IES RP-8, but what municipalities actually enforce varies considerably. Some jurisdictions enforce Title 24 energy codes with specific efficacy and control requirements. A growing number have adopted DarkSky International ordinances with color temperature restrictions and full-cutoff fixture requirements. ADA requirements apply to pedestrian zone illumination in ways that are not always obvious from the standard alone. Some municipalities have local amendments that supersede or supplement the IES recommendations entirely.

We build code compliance into the design from the start rather than treating it as a review step at the end. That matters because code conflicts caught during design development cost time but not money. The same conflicts discovered during permit review, or worse, after installation, cost both.

Our process includes a jurisdiction-specific code review as part of every engagement. We identify applicable standards, flag any requirements that may conflict with the owner's preferences or the project's budget assumptions, and document the basis of design in a way that supports the permit submission. For clients who need a code variance, we can support that process as well.

The primary governing standard for parking facility and roadway lighting is ANSI/IES RP-8, which specifies maintained footcandle levels and uniformity ratio requirements for parking fields, drive aisles, pedestrian crossings, and related zones. It is the standard most jurisdictions reference, and it is the framework our photometric process is built around.

A few things about IES standards that are worth understanding clearly. First, IES recommendations are industry guidance, not legal requirements in most jurisdictions. What municipalities actually enforce is local code, which may reference IES standards, exceed them, or in some cases not reference them at all. In premises liability litigation, it is typically municipal code conformance that opposing counsel establishes, not IES compliance. Our process addresses both, but they are not the same thing, and treating them as interchangeable creates documentation gaps that matter when a claim surfaces.

Second, IES RP-8 specifies uniformity ratios as well as average footcandle levels. The maximum uniformity ratio for general parking areas is 4:1 (average to minimum). For higher-security applications it is 3:1. A design that satisfies its average footcandle target while failing its uniformity ratio is not compliant, full stop. This is the most commonly overlooked failure point in vendor-produced lighting layouts, and it is the one that creates the most serious downstream exposure.

Third, IES standards address maintained illumination, not just initial. LED lumen depreciation curves and dirt depreciation factors must be modeled to confirm the design meets IES minimums at the end of the maintenance cycle, not just at the moment of installation. A design that passes at installation but falls below minimums within three years has not actually met the standard in any practical sense.

OSL's photometric process models all three dimensions: average and minimum values across every zone, initial and maintained illumination, and zone-specific targets that reflect the distinct IES recommendations for each area type. That is what produces a design that holds up, not just at installation, but across the life of the asset.

Yes, and it is worth addressing both at the design stage rather than treating them as future add-ons. On the controls side, networked lighting controls are increasingly specified as part of ground-up outdoor designs, not as an upgrade, but as a performance layer that affects how the design holds up over time. 

For large parking fields where manual inspection of every fixture is not practical, remote monitoring enables proactive maintenance rather than reactive response to outages. Time-of-day dimming and occupancy-based scheduling add meaningful energy reduction in low-traffic periods, on top of the base efficiency gains from a properly specified LED installation. Where controls integration is part of the project scope, we specify the conduit infrastructure and control architecture at the design stage so it is built in rather than retrofitted.

On the EV side, the conversation between lighting design and EV charging infrastructure is mostly about conduit routing and electrical capacity planning. Parking fields that are being designed or retrofitted now for LED lighting are also the most cost-effective point to rough in conduit for future EV charging circuits, because the trenching and electrical infrastructure work overlaps significantly. Addressing that in the lighting design phase, rather than returning to the site later for a separate EV project, typically reduces the combined cost of both improvements materially.

We are not EV charging system designers, and we are transparent about where our scope ends. But our electrical engineers can work with your team to ensure the lighting design does not foreclose options or create conflicts with EV infrastructure that is already planned or likely to be needed. The time to have that conversation is during design development, not during value engineering or after installation.

Photometric design is the engineering process of calculating how light will actually perform on a specific site before any fixture is selected or purchased. It uses professional modeling software to determine light levels, uniformity ratios, and distribution patterns across every zone of the property, including parking fields, drive aisles, pedestrian crossings, building entries, and perimeter areas.         

It matters because the alternative is estimation. When a vendor walks a site and recommends fixtures from their catalog, they are making educated guesses about coverage, spacing, and wattage. Those guesses tend to default toward over-specification: more poles, higher wattage, tighter spacing, because it is easier and safer for the vendor to over-build than to model correctly. The owner pays for that margin of error upfront in material and installation costs, and then continues paying for it in energy bills for the life of the installation.

Photometric design eliminates that guesswork. We have consistently reduced fixture counts by 15 to 25 percent from initial vendor proposals, not by compromising light levels, but by placing the right fixture in the right location with the right distribution. On one project alone, that process reduced the pole count from 14 to 9, eliminating roughly $50,000 in upfront cost. That outcome is only possible when the design starts from the site, not the catalog.

For engineers and architects, photometric design also produces the documentation your project requires: defensible calculations for permitting, code compliance review, and specification-grade deliverables that integrate directly into your documentation set without requiring supplemental engineering work.

Though our primary focus is on the specialty of outdoor lighting, indoor commercial lighting is well within our capability. We have completed indoor projects across retail, office, warehouse, and mixed-use settings. We design for CCT (color conformity) and flow with the indoor design aesthetic along with the more technical specifications required.

The technical demands of large-scale outdoor environments, particularly high-traffic parking fields, retail campuses, and mixed-use sites, require a specific combination of photometric rigor, code compliance depth across multiple jurisdictions, and manufacturing independence that we have built our practice around over 25 years. That is where our track record is deepest and where we can make the strongest case for the value of professional design.

For clients who need both, we are a capable and convenient single resource. The same manufacturing-agnostic approach, the same performance-parameter specifications, and the same engineering documentation standards apply indoors. If you are working on a project that includes significant outdoor scope alongside interior requirements, it is worth a conversation about whether a combined engagement makes sense for your project and your client.

If your project is primarily or exclusively interior, we are happy to discuss it. We will be straightforward with you about whether we are the right fit, and if a project calls for a specialist whose primary practice is interior commercial lighting, we will say so. That kind of honest assessment is how we have built the relationships we have.