Create the packet before requesting a quote: create one traceable record for each distinct lighting zone, then assign fixture-group IDs within that record. Attach measurements, fixture and control notes, labeled photos, access limits, and open questions to the matching IDs. A useful commercial lighting site survey separates observed facts, estimates, and unknowns, giving a contractor or lighting-design team the context needed for a preliminary review without treating the packet as approval to order or install.
Start the Commercial Lighting Site Survey With One Record per Zone
Create one zone record for each distinct area, then assign fixture-group IDs within it. Split areas into separate zone records only when the room, task, fixture group, control arrangement, ceiling condition, or access changes the decision.
A utility retrofit guide emphasizes identifiable areas and specific location descriptions in distinct, identifiable zone records, but this is a practical handoff method, not a universal form for private projects. For each zone, record the space name, current use, requested scope, task locations, normal operating limits, and access restrictions. Note whether the area is an office, sales floor, workbench, aisle, parking edge, restroom, or another task environment.
Use a sketch or marked-up floor plan as the record's map. Mark doors, windows, partitions, beams, ductwork, shelving, signs, panels, fixed equipment, and other obstructions. Add fixture-group IDs to the sketch, and label every field as measured, estimated, unknown, or not accessible. This keeps the facility-wide fixture count connected to the room and task it represents.
Measure Room Scale, Ceiling Conditions, and Fixture Layout
Use the zone ID as the key while measuring. Record room dimensions, ceiling and mounting conditions, fixture geometry, spacing, task locations, and obstructions. Treat unclear dimensions as review inputs—not proof that a product will fit.
The goal is to show the scale, mounting conditions, spacing, and access constraints that could affect a replacement or layout review. Guidance for federal buildings supports documenting existing luminaire dimensions, mounting, ceiling conditions, and access as inputs for retrofit or new-luminaire review through existing luminaire dimensions and mounting; its federal context does not create a universal requirement for a small private facility.
On the zone measurement sheet, record:
- Room length, width, irregular-footprint legs, and floor-to-ceiling height.
- Soffits, slopes, mezzanines, exposed structure, and any other ceiling or elevation changes.
- The visible ceiling or mounting surface, such as grid, drywall, concrete, open deck, wood, or metal.
- Fixture-group form, quantity, approximate length, width, depth, diameter, or opening size.
- Fixture mounting height, center-to-center spacing, and offsets from walls or fixed features.
- The visible attachment or suspension method, including brackets, chains, stems, surface mounts, or other interfaces.
- Task locations and obstructions, including beams, ductwork, sprinklers, shelving, signs, equipment, partitions, panels, and lifts.
- Surface conditions such as moisture, corrosion, brittleness, heat effects, damage, dust, vibration, or chemical exposure.
Use the same fixture-group ID on the sketch and measurement sheet. Record dimensions clearly enough for a reviewer to assess fit, ceiling disturbance, and layout questions, but do not invent a universal measurement tolerance. If a mounting interface or above-ceiling condition cannot be viewed safely, record it as unknown rather than turning an estimate into a product-fit conclusion.
Photograph Every Fixture Group and Its Surrounding Evidence
For each zone and fixture group, capture the context, fixture identity, mounting context, controls, conditions, and safely visible labels. The set should help a remote reviewer connect each image to the survey record without climbing, removing covers, or inspecting hidden equipment.
A commercial inspection checklist supports wide-area and fixture-group photos, including control and label evidence, but it should be treated as a robust documentation model—not as a mandatory image count or camera standard. Photograph switches, dimmers, occupancy or vacancy sensors, photocells, timers, emergency-related devices, unusual adapters, brackets, chains, pendant stems, exposed conduit, damaged supports, moisture, corrosion, heat effects, and other conditions that could change fit or access.
A wide view shows where the group is located; a fixture view shows its form; a mounting view shows the visible interface; and a control or label view connects the installation to its operating and identity records. Use a consistent local filename such as SiteID-ZoneID-FixtureGroup-ViewDirection. Examples include WH1-OFF-01-FG-A-wide, WH1-OFF-01-FG-A-mount, and WH1-OFF-01-FG-A-label.
The cited checklist uses project or site and equipment identifiers in its naming example. Include a site or project token so files remain identifiable outside the packet, but adapt the exact convention to the recipient's preference. Match each image to the zone record, sketch, and measurement sheet. Use more than one direction or a scale reference when practical and safe, especially when clearance or an opening must be interpreted. If a view is missing because the area is occupied, too high, obstructed, or otherwise inaccessible, list that limitation instead of climbing, removing covers, or opening equipment.
Record Controls, Visible Electrical Details, Conditions, and Access Limits
Keep controls, operating conditions, and visible electrical details in a separate survey section. Record what can be observed safely, then route unresolved electrical, emergency, code, permitting, hazardous-condition, compatibility, and difficult-access questions to the appropriate qualified professional or project authority.
Record each switch or control location, the fixture groups it appears to serve, and observed behavior such as dimming, occupancy or vacancy sensing, photocell operation, timer behavior, relay control, multilevel operation, emergency-related behavior, or exterior control. Mark the relationship as unknown when it was not confirmed. DOE evaluation guidance treats fixture quantity, wattage, control information, and building-specific operating hours as separate inputs, including in its discussion of fixture quantities and wattage records.
From a safe position, photograph or transcribe readable model or catalog markings, input voltage, frequency, wattage, current, lamp or driver information, ratings, and control notes. Treat schedules, old drawings, and project documents as references—not proof that the installed conditions still match. Record operating hours and after-hours use when known.
Also document occupied hours, equipment that cannot be moved, ceiling height, lift availability, and other access limits. Note visible moisture, corrosion, heat, dust, vibration, chemical exposure, damaged supports, or unusual surfaces without declaring them structurally safe or unsafe. These observations help the reviewer determine whether a remote assessment is appropriate or whether a site visit is needed.
Do not open energized equipment, perform live testing, or determine wiring, load, circuit behavior, emergency operation, hazardous-location status, code or permitting needs, or compatibility from appearance alone. Put each unresolved item in an open-question log with four fields: what is missing, why it matters, who should verify it, and whether it blocks quoting, design, ordering, or safe access.
Assemble and Send the Replacement Survey Packet
When practical, assemble a searchable zone table or spreadsheet alongside the marked-up plan, labeled photos, source documents, and open-question log. Choose the status before sending so the recipient can distinguish a preliminary review from items that need verification first.
| Status | Use it when | Next action |
|---|---|---|
| Ready for quote/design review | Every zone and fixture group is identifiable; measurements and photos are interpretable; controls, visible records, access limits, and unknowns are documented. | Send for preliminary review and note any assumptions. |
| Verify first | A critical label, control relationship, mounting condition, emergency detail, access view, electrical input, or unusual condition remains unresolved. | Name the verifier and resolve the item before ordering if it blocks the decision. |
"Ready for quote/design review" means the packet is traceable enough for preliminary evaluation. It does not establish compatibility, code compliance, emergency performance, or installation readiness. If a missing detail could change the replacement approach or safe access, use Verify first even when the photo folder appears complete.
Use this copyable checklist as the final attachment list:
- [ ] Project identifier, facility scope, requested replacement scope, and recipient contact
- [ ] Zone list with one ID per area and fixture-group IDs within each zone
- [ ] Marked-up sketch or floor plan showing tasks, fixtures, controls, doors, equipment, and obstructions
- [ ] Room dimensions, ceiling heights, elevation changes, mounting surfaces, and access limits
- [ ] Fixture count, form, approximate dimensions, spacing, wall offsets, mounting height, and visible attachment method
- [ ] Task locations and clearance or obstruction notes
- [ ] Controls record showing locations, served groups, observed behavior, and unknown relationships
- [ ] Labeled wide-area, fixture, mounting, control, condition, and safely visible label or nameplate photos
- [ ] Visible electrical and fixture-record notes, including model, voltage, frequency, wattage, current, lamp or driver information, and ratings when readable
- [ ] Surface, environmental, occupied-hours, equipment, lift, and access-condition notes
- [ ] Open-question log with decision impact, verifier, and blocking status
- [ ] "Ready for quote/design review" or "Verify first" status
- [ ] Review request stating: confirm assumptions, identify missing inputs, and advise whether a site visit or professional verification is needed before ordering
Send the packet with the checklist and review request. The recipient's response should establish whether the commercial lighting replacement remains in preliminary review or moves to Verify first before ordering. If the project also requires approval documents, use a separate lighting submittal documentation guide, but do not treat submittal paperwork as a substitute for unresolved site information.
Frequently Asked Questions
These questions address decisions that can arise when a survey detail is incomplete, ambiguous, or being reviewed remotely.
What should a commercial lighting site survey answer before a quote?
It should let the reviewer connect each area, fixture group, task, control relationship, and visible condition to a specific record. If an unresolved detail could change the replacement approach, label the packet Verify first instead of letting a complete-looking photo folder imply readiness.
What photos should I send for a commercial lighting quote?
Prioritize the view that resolves the review question: use a wide view for location, a mounting view for the visible interface, and a label or control view for identity and operation. No photo should be used to establish hidden wiring, load, structural capacity, or compatibility.
What information does a lighting designer need from a small commercial site survey?
The designer needs consistent IDs across the sketch, measurement sheet, and photo filenames so separate areas are not merged during review. Include source documents and the open-question log when available, and identify which unknowns may change layout or access decisions.
When should electrical details be verified by a qualified professional before replacing commercial lights?
Before ordering, seek project-specific or qualified verification when an uncertain voltage, load, wiring condition, control relationship, emergency detail, code or permitting question, hazardous condition, damaged mounting point, or difficult access could change the decision. Do not open energized equipment or perform live testing to fill the gap.
