Most commercial lighting retrofits fail for the same reason: someone picked a fixture before anyone measured the space. Swapping metal halide high bays for LED panels one for one looks efficient on a spreadsheet and produces glare, dead corners, and a call back to the contractor six weeks later. A retrofit done properly starts with the room, not the catalog.

Here is how a commercial LED lighting retrofit actually runs in a working Dallas–Fort Worth facility, and what a building owner or facility manager should expect at each stage.

Stage One: The Lighting Audit

Before any fixture is specified, the existing condition gets documented. That means counting and identifying every fixture, lamp type, and ballast; recording mounting heights and ceiling conditions; noting existing circuiting and switch legs; and taking light level readings at the work plane in each functional zone.

The audit also captures what nobody writes down: which areas the staff complain about, where the loading dock goes dark at shift change, which offices have people working under a desk lamp because the overhead is too dim. Those observations shape the design more than the fixture spec sheet does.

What the audit should produce

A fixture-by-fixture inventory with quantities, types, and locations
Existing light levels by zone, measured rather than assumed
Circuit and panel capacity notes for the affected areas
Identification of any ceiling, asbestos, or access constraints
A list of areas where the current layout is wrong regardless of lamp technology

Stage Two: Design and Fixture Selection

This is where a retrofit becomes a lighting design and layout project rather than a parts swap. Fixture count, spacing, mounting height, distribution, color temperature, and glare control all get resolved against the actual tasks performed in each space.

Color temperature and color rendering

Warehouse aisles, machine shops, retail floors, and offices do not want the same light. Cooler color temperatures read as crisp in industrial spaces and clinical in a customer-facing lobby. Color rendering matters anywhere staff inspect finish quality, match materials, or read color-coded wiring. Decide these deliberately and consistently across the building, because mixed color temperatures in one line of sight look like a mistake even when each fixture is individually fine.

Controls are part of the design, not an upsell

Occupancy sensing, daylight harvesting, and zoned scheduling deliver savings that a fixture swap alone cannot, because the cheapest lit hour is the one that never happens. In spaces with intermittent occupancy — storage mezzanines, stairwells, restrooms, back-of-house corridors — controls often matter more than fixture efficiency. Where the facility already runs building automation, lighting control can be brought into the same automation and control system rather than living on its own island.

Stage Three: Electrical Scope Nobody Budgeted For

Retrofits routinely uncover conditions that have to be corrected before new fixtures go up. Deteriorated whips, undersized or shared neutrals, junction boxes buried above inaccessible ceilings, emergency egress fixtures on the wrong circuit, and switch legs that no longer match how the space is used. None of this is optional once it is exposed.

A contractor who has walked the building will flag these in the proposal instead of issuing change orders halfway through. Ask specifically what the bid assumes about existing wiring condition and what happens if that assumption proves wrong.

Stage Four: Phasing Around Your Operation

The retrofit schedule is the part building owners feel. A facility that runs one shift can often be done in normal hours by zone. A distribution center running around the clock needs night or weekend work, area by area, with temporary lighting in place and every zone returned to service before the next shift.

A workable phasing plan defines

The zone sequence and how long each zone is out of service
Which circuits are de-energized and when, coordinated with your operations lead
Temporary lighting and egress lighting during the work
Lift and access requirements, including any racking that has to be cleared
Disposal and recycling of removed lamps and ballasts

Stage Five: Verification and Closeout

A retrofit is not finished when the last fixture is hung. Light levels should be re-measured against the design targets in each zone, controls should be commissioned and walked with the facility team, and the as-built circuiting should be documented for whoever maintains the building next. Warranty terms for fixtures and drivers should be in writing, with a clear path for handling early driver failures.

Ongoing electrical maintenance gets simpler after a well-executed retrofit, because a standardized fixture and driver inventory replaces a mixed population of aging lamp types.

Questions Worth Asking Any Bidder

Did you measure existing light levels, or estimate them?
What happens to the price if concealed wiring conditions differ from the assumption?
Which fixtures and drivers are specified, and what is the written warranty?
Who commissions the controls, and will my team be trained on them?
How is egress and emergency lighting handled during and after the work?

A retrofit proposal that answers these in writing is a plan. One that quotes a fixture count and a lump sum is a guess.

Talk to Hargrove Electric

If you are evaluating a lighting retrofit for a commercial or industrial facility in the Metroplex, start with an audit rather than a fixture quote. Hargrove Electric has served commercial and industrial clients across the Dallas–Fort Worth Metroplex for over 55 years, operating under Texas Electrical Contractor License #17522. Call 214-742-8665 or contact us online to schedule a walkthrough.