LED lighting retrofits are one of the highest-volume energy efficiency projects in commercial buildings right now, and for good reason. The economics are compelling even without incentives. With incentives, the payback period can compress to 18-24 months on projects that would otherwise take four years. But a significant portion of the incentive money available for Louisiana commercial buildings goes unclaimed every year because the controls were not properly included, commissioned, or documented.
This is fixable. The requirements are not complicated; they just need to be understood before the project is scoped.
Why Controls Change the Rebate Calculation
Most utility incentive programs for commercial lighting use a calculated energy savings methodology. They estimate the kilowatt-hours saved per year based on the difference between pre-retrofit and post-retrofit wattage, multiplied by the estimated annual operating hours.
Basic LED-only retrofits capture the wattage reduction savings. Controls capture additional savings on top of that by reducing the actual operating hours and the actual wattage during occupied hours. Occupancy sensors turn lights off when spaces are unoccupied. Daylight harvesting dims fixtures when there is sufficient natural light. Scheduling eliminates runtime during hours when the building is closed.
Entergy Louisiana and CLECO both offer commercial efficiency programs that provide incrementally higher incentives when controls are included. The typical rebate structure pays a base incentive for the wattage reduction and an additional incentive for each control type that is installed and properly commissioned. The combined incentive can cover 30-50% of total project cost for qualifying installations.
The specific incentive rates change from program year to program year, and program details are subject to change, so always verify current rates directly with the utility or through a qualified energy consultant before finalizing project budgets. As a general reference, combined LED plus controls rebates in the range of $0.05-$0.15 per annual kilowatt-hour saved have been available in our market, but verify this against current program terms.
Controls That Qualify for Incentives
Not every lighting control qualifies for every program, and the requirements vary by space type and control type. The controls categories that most commonly generate incremental incentives are:
Occupancy and vacancy sensors in enclosed spaces. A conference room, private office, restroom, or storage area with an occupancy sensor that turns lights off after a period of inactivity is the most commonly qualifying control type. The distinction between occupancy sensors (which turn lights on automatically when occupancy is detected) and vacancy sensors (which require a manual on but turn off automatically) matters for some programs. Vacancy sensors are generally considered a more aggressive energy savings measure.
Daylight responsive dimming. Fixtures within a defined distance of windows or skylights that dim automatically in response to daylight levels qualify in most programs. The sensor must be a properly calibrated photocontrol, and the dimming response must be continuous or at least multi-step rather than simple on/off switching.
Automatic scheduling controls. A programmed schedule that turns lights off during unoccupied hours qualifies as a control measure. The schedule must be active (not overridden to manual on) at the time of inspection and must be documented.
Task tuning (maximum light level adjustment). Reducing the maximum dimming level from 100% to 80% in spaces that have historically been over-lit is a qualifying measure in some programs. This requires documentation of the original light level and the adjusted setpoint.
The qualification requirements typically include: documentation of pre-retrofit conditions (fixture count, wattage, lamp type), documentation of post-retrofit conditions (fixture count, wattage, control type and location), and verification that controls are installed, functional, and programmed correctly at the time of inspection.
The Most Common Rebate Mistakes
Installing controls but not commissioning them. This is the most expensive mistake. A motion sensor in the wrong sensitivity setting that triggers constantly or not at all, a daylight sensor that is calibrated to the wrong light level, or a schedule that was never programmed are all "installed" controls that will fail a utility inspection. The rebate requires functional controls, not just hardware presence.
We have walked into buildings where occupancy sensors were installed by the electrical contractor and left in factory default settings. In some configurations, the factory default mode is appropriate. In others, it is not. A sensor mounted in a conference room set to the wrong time delay, or pointed in a direction where it cannot see the occupants at the conference table, is not a functional control. Commissioning verifies that the sensor does what it was installed to do.
Choosing fixtures that are not compatible with 0-10V dimming. Not all LED fixtures support the 0-10V dimming interface that most commercial dimming systems use. Some LED drivers have a different dimming interface (DALI, phase-cut, or proprietary). If you are specifying a project that includes daylight harvesting or centralized dimming controls, verify fixture and driver compatibility with the control system before the fixtures are ordered. Discovering incompatibility after installation is an expensive problem.
Not documenting pre-retrofit conditions. The rebate application requires proof of what you replaced. This means fixture counts by type, wattage measurements, and space-by-space documentation before anything is removed. Many contractors start removing old fixtures without completing this documentation because it slows down the installation crew. The result is a rebate application that cannot be substantiated.
Treating the controls and the fixture as separate scopes. Lighting contractors who specialize in fixture replacement often subcontract or defer the controls work to an electrician who may not have experience with commissioning. The result is controls that are installed but not functioning as required. Having a single contractor responsible for both the fixtures and the controls, including commissioning, produces better outcomes.
The BAS Integration Opportunity
If your building has an existing building automation system and you are doing a lighting retrofit, the retrofit is the logical time to bring your lighting into the BAS. Integration options include:
- BACnet or Modbus lighting controllers that communicate with your Niagara front end, enabling centralized scheduling and monitoring of lighting zones alongside HVAC systems
- Occupancy sensor data fed into the BAS to trigger HVAC setback when spaces are detected as unoccupied, coordinating the lighting and HVAC responses to the same occupancy event
- Energy submetering at the lighting panel level, providing before-and-after consumption data that supports both utility rebate documentation and ongoing energy reporting
The incremental cost of BAS integration is typically modest compared to the total retrofit budget, and the ongoing value in coordinated control and energy visibility is significant. If you are having the conversation with an electrical contractor who specializes in lighting and they are not raising BAS integration as an option, it is worth asking the question directly.
What to Do Before the Project Starts
Before you finalize a lighting retrofit scope, do these three things:
First, contact your utility's commercial efficiency program directly or through a participating contractor to confirm current rebate availability, requirements, and inspection procedures. Program terms change.
Second, verify that your lighting contractor includes commissioning of controls as a defined scope item, not an afterthought. Get it in writing with specific deliverables: sensor adjustments documented, schedules programmed and verified, daylight controls calibrated.
Third, document existing conditions before any work begins. Fixture counts, measured wattage (not just nameplate wattage), and photographs of existing conditions are your evidence for the rebate application.