Commercial LED Retrofit: How Bay Area Businesses Can Save Up to 40–70% on Energy

Lighting accounts for 20% to 40% of total electricity consumption in most commercial buildings, making it the single largest controllable energy expense for Bay Area businesses. If your office, warehouse, retail store, or industrial facility still relies on fluorescent tubes, metal halide fixtures, or high-pressure sodium lamps, you are paying significantly more for electricity than you need to be. A commercial LED retrofit typically reduces lighting energy consumption by 40% to 70%, with some facilities seeing even greater savings.

Beyond energy savings, LED retrofits improve light quality, reduce maintenance costs, extend fixture life, and help businesses meet California's increasingly strict energy code requirements. With PG&E commercial rebates offsetting a substantial portion of the upfront cost, the payback period for most projects is 12 to 24 months.

Why Replace Fluorescent and HID Lighting?

T8 and T12 fluorescent tubes have been the standard in commercial buildings for decades, but they come with well-documented drawbacks that LEDs eliminate:

• Energy waste: A 4-foot T12 fluorescent tube consumes 40 watts. A direct LED replacement tube uses 15 to 18 watts and produces the same or better light output. T8 tubes are more efficient than T12s but still consume 25% to 40% more energy than their LED equivalents.
• Ballast failures: Fluorescent tubes require ballasts, which degrade over time, reduce efficiency, and eventually fail. LED tubes either bypass the ballast entirely (Type B direct wire) or work with existing ballasts (Type A plug-and-play) while being far less dependent on them.
• Mercury content: Every fluorescent tube contains mercury, requiring special handling and disposal. LEDs contain no hazardous materials, simplifying waste management and reducing environmental liability.
• Light quality: Fluorescent lighting often produces a cool, harsh light with visible flicker that causes eye strain and headaches. Modern LEDs offer tunable color temperatures (3000K to 5000K), high CRI (color rendering index) for accurate color representation, and flicker-free operation.
• Maintenance frequency: Fluorescent tubes last 20,000 to 30,000 hours. LED tubes last 50,000 to 100,000 hours, cutting replacement frequency by half or more. In a warehouse with hundreds of fixtures, this translates to thousands of dollars in reduced maintenance labor.

High-intensity discharge (HID) lamps, including metal halide and high-pressure sodium, are common in warehouses, parking garages, and outdoor areas. These fixtures consume 150 to 1,000 watts each and require long warm-up and restrike times. LED high-bay and area lights replace them at 40% to 60% of the wattage with instant-on capability, dimming support, and dramatically longer life.

PG&E Commercial Lighting Rebates

PG&E offers rebates for commercial LED retrofit projects through its Business Energy Efficiency program. These rebates are available to PG&E commercial and industrial customers in the Bay Area and can meaningfully reduce the upfront investment. The program generally includes two rebate pathways:

• Deemed (prescriptive) rebates: Fixed dollar amounts per fixture or lamp for common retrofit measures (for example, T8 fluorescent troffer-to-LED-panel swaps, or metal halide high-bay-to-LED-high-bay swaps). Per-fixture amounts vary by measure and are updated periodically in PG&E's business rebate catalog.
• Custom (calculated) rebates: For larger or more complex projects, rebates are calculated based on modeled energy savings (a $/kWh saved approach). Custom rebates often outperform deemed rebates for facilities with long operating hours.

PG&E requires that all rebate projects be completed by a qualified contractor and that the installed products meet the program's efficiency specifications. Pre-approval is typically required for custom rebate projects. Current rebate amounts and program rules change frequently — confirm with PG&E or your installer before specifying products. YKCA Electric handles the entire rebate application process for our commercial clients, including energy calculations, product selection, pre-approval submissions, and post-installation documentation.

Real-World Examples: Bay Area Businesses

Here are three representative LED retrofit scenarios for Bay Area commercial facilities. These examples illustrate typical savings and payback periods — actual results vary by facility size, operating hours, existing fixture types, and utility rate schedule.

Office Building (25,000 sq ft, San Mateo)

• Replaced 180 recessed 2x4 fluorescent troffers with LED flat panels
• Added occupancy sensors in conference rooms, restrooms, and storage areas
• Annual energy savings: 62,000 kWh ($14,800 at PG&E commercial rates)
• Project cost: $28,000 (before rebates)
• PG&E rebate: $7,200
• Net cost: $20,800
• Simple payback: 17 months

Warehouse / Distribution Center (80,000 sq ft, Fremont)

• Replaced 96 metal halide high-bay fixtures (400W each) with LED high-bays (150W each)
• Added daylight harvesting sensors near skylights
• Annual energy savings: 185,000 kWh ($40,700 at PG&E commercial rates)
• Project cost: $72,000 (before rebates)
• PG&E rebate: $19,200
• Net cost: $52,800
• Simple payback: 16 months

Retail Store (4,000 sq ft, Palo Alto)

• Replaced track lighting with LED track heads and swapped recessed fluorescents with LED downlights
• Improved CRI from 70 to 93, dramatically enhancing product display quality
• Annual energy savings: 11,500 kWh ($2,760 at PG&E commercial rates)
• Project cost: $8,500 (before rebates)
• PG&E rebate: $2,100
• Net cost: $6,400
• Simple payback: 28 months

Calculating Your Payback Period

The simple payback formula for an LED retrofit is straightforward:

Payback (months) = Net Project Cost / Monthly Energy Savings

To estimate your potential savings before contacting a contractor, gather this information:

• Current fixture count and wattage: Count all fixtures and note their wattage (printed on the lamp or ballast). Multiply total wattage by average daily operating hours and 365 days to get annual kWh.
• Operating hours: Offices typically run lights 10 to 12 hours per day. Warehouses may run 16 to 24 hours. Retail varies by format.
• Electricity rate: Check your PG&E bill for your commercial rate per kWh. Bay Area commercial rates in 2026 typically run $0.25–$0.42 per kWh depending on your rate schedule — small commercial customers on B-1 Time of Use see the higher end (PG&E's published B-1 TOU total rate sits around $0.42/kWh as of January 2026), while large commercial customers on B-19 with separate demand charges see lower per-kWh energy charges in the $0.20–$0.30 range. Time-of-use tier and seasonality also affect the rate. Case examples in this article use a representative rate near the lower end of this range — actual savings at your facility may be higher.
• LED replacement wattage: Use manufacturer data for the LED replacement. A rough estimate is 50% to 60% of the original fluorescent wattage and 35% to 45% of the original HID wattage.

For a more accurate analysis, YKCA Electric provides free commercial lighting audits. We survey your facility, document every fixture, calculate energy savings, identify applicable rebates, and deliver a detailed proposal with projected payback and ROI.

California Title 24 Compliance

California's Title 24 Building Energy Efficiency Standards apply to all commercial lighting retrofit projects. When you replace more than 40 fixtures or modify more than 10% of the lighting in a space, the project triggers Title 24 compliance requirements. This means the new lighting must meet current energy code standards, including:

• Maximum lighting power density (LPD) measured in watts per square foot, which varies by space type. The 2025 Title 24 updates (effective for permits filed January 1, 2026 and later) tightened limits, including a 0.65 W/sq ft cap for offices and 0.9 W/sq ft for retail. Confirm current LPD values for your space type against the latest Title 24, Part 6 tables.
• Automatic daylight controls in daylit zones within 15 feet of windows and skylights
• Occupancy sensors in enclosed offices, conference rooms, restrooms, break rooms, and storage areas
• Demand response capability for lighting systems in buildings over 10,000 square feet
• Automatic time-switch controls (scheduling) for all lighting systems

LED technology makes Title 24 compliance easier to achieve because LED fixtures inherently use less power per square foot than their fluorescent and HID predecessors. In many cases, a retrofit that would have required difficult compromises with fluorescent technology meets code comfortably with LEDs.

The Utility Rebate Process: Step by Step

Navigating PG&E's commercial rebate program is straightforward when you work with an experienced contractor. Here is the process:

• Step 1 - Lighting audit: A licensed electrician surveys your facility and documents existing fixtures, wattages, and operating hours.
• Step 2 - Proposal and rebate estimate: Your contractor designs the LED retrofit, selects qualifying products, and calculates the expected rebate amount.
• Step 3 - Pre-approval (custom projects): For custom rebate projects, submit the application and energy calculations to PG&E for approval before starting work.
• Step 4 - Installation: Licensed electricians install the new LED fixtures, controls, and sensors. Depending on facility size, installation typically takes 1 to 5 days.
• Step 5 - Inspection and documentation: Post-installation inspection verifies the work meets code and rebate requirements. Photographs, invoices, and product specifications are compiled for the rebate application.
• Step 6 - Rebate submission: Submit the completed application with all documentation to PG&E. Rebate checks typically arrive within 8 to 12 weeks.

Beyond Energy: Additional Benefits of LED

While energy savings drive most retrofit decisions, businesses often report additional benefits that are harder to quantify but equally valuable:

• Employee productivity: Studies consistently show that better lighting quality improves focus, reduces errors, and decreases absenteeism. Tunable white LEDs allow you to match color temperature to the time of day, supporting circadian rhythms.
• Customer experience: Retail stores with high-CRI LED lighting report increased dwell time and higher per-visit spending. Products look more appealing under lighting that renders colors accurately.
• Reduced HVAC load: LEDs generate significantly less heat than fluorescent and HID fixtures. In air-conditioned spaces, this translates to additional cooling energy savings of 5% to 10%.
• Safety and visibility: LED high-bays in warehouses provide uniform, shadow-free illumination that reduces workplace accidents. Instant-on capability eliminates the dangerous dark period during HID restrike.

Get a Free Commercial Lighting Audit

YKCA Electric provides comprehensive commercial LED retrofit services for Bay Area businesses. From initial audit through rebate processing, we manage every aspect of the project. Our team has completed LED retrofits for offices, warehouses, retail spaces, restaurants, medical offices, and industrial facilities throughout the San Francisco Bay Area.

Call us at (650) 550-0719 or request a free lighting audit to find out how much your business can save with an LED retrofit. We will provide a detailed proposal with energy calculations, rebate estimates, and a clear payback timeline.

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