Retrofit vs. New Install: The Comparison Framework
I review lighting specifications for industrial and commercial projects—roughly 200+ unique systems annually across our facility upgrades. One question keeps coming up: should we retrofit the existing ABB lighting infrastructure, or tear it all out and start fresh?
The answer isn't as straightforward as most vendors make it sound. Let me walk through the three dimensions that actually matter when making this call.
Dimension 1: Upfront Site Assessment vs. Assumed Compatibility
New install starts with a clean slate. You specify the ABB fixtures, controls, and wiring from scratch. It feels tidy—and it is, on paper. You know every component is designed to work together from day one.
Retrofit, in my experience, demands a level of due diligence most teams underestimate. In Q1 2024, we received a batch of retrofit LED tubes for an older ABB emergency lighting system. The vendor claimed they were 'direct replacements.' Turned out our existing emergency ballasts were incompatible with the driver topology in the new tubes. That cost us a $22,000 redo and delayed the floor reopening by three weeks.
I don't have hard data on industrywide retrofit failure rates, but based on our 5 years of orders, my sense is that about 8–12% of first-attempt retrofits hit an unforeseen compatibility issue. The difference? A proper site survey catches 90% of those.
If I remember correctly, our standard protocol now requires a physical inspection of at least 5% of existing fixtures before approving a retrofit spec. It adds 2–3 days to the timeline but has eliminated compatibility-related rework entirely.
Dimension 2: Installation Complexity and Downtime
New install means ripping out old infrastructure. Conduit, junction boxes, sometimes structural work. Depending on the facility footprint, that could mean shutting down sections for days or even weeks. I reviewed a proposal for a 50,000 sq ft warehouse—quoted at 12 days of phased downtime for full replacement. The production loss alone was estimated at $18,000.
Retrofit can sometimes be done with minimal disruption. ABB's retrofit kits for their own contactors and emergency lighting units are designed to reuse existing mounting points and wiring. In a recent project, we retrofitted 300 ABB emergency EXIT units over two weekends. No production downtime. That's the appeal.
But here's where my gut and the data conflicted last year. The numbers said retrofit for a 20-year-old facility—cheaper, faster, less downtime. Something felt off about the lighting contactors. Turns out the existing control wiring was 1960s-era cloth-insulated that couldn't handle the new IoT-enabled ABB Ability controls we wanted. We had to pull new wire anyway. The retrofit saved us on fixture cost but not on controls infrastructure.
Lesson: retrofit the fixtures by all means, but verify the backbone. I wish I had checked the contactor control circuit gauge before committing to the approach.
Dimension 3: Performance, Efficiency, and Compliance
New install guarantees you can hit the latest energy codes and emergency lighting runtime requirements. ABB's current generation of industrial fixtures delivers 140–160 lumens per watt depending on configuration. If you need to meet LEED v4.1 or specific local energy standards, new install is the surest path.
Retrofit performance depends entirely on what you're starting with. Replacing a T8 fluorescent with an ABB LED retrofit tube can cut energy use by 40–50%. But here's what surprised me: when we tested 200 units in a stairwell retrofit, the actual energy savings were 38%—slightly below the 44% the spec sheet promised. The difference? The existing fixture reflectors were degraded, scattering light differently than the new LEDs expected. We adjusted the aiming angle in the retrofit kit and got back to 42%.
I went back and forth between reporting the 'underperformance' or just accepting it. Ultimately, I documented the adjustment in our quality log. Honesty matters more than perfect numbers.
For emergency lighting compliance, this gets critical. I've never fully understood why some retrofit emergency drivers underperform on runtime tests, but my best guess is mismatch between the LED load and the driver's designed voltage drop. We now mandate a full 90-minute discharge test on any retrofit emergency system. Two batches out of thirty failed. Caught before installation.
So Which One Should You Choose?
I recommend a retrofit when:
- Your existing ABB infrastructure is less than 15 years old
- You've verified the control wiring is compatible with new IoT controls (or you'll accept keeping basic on/off switching)
- You can tolerate some performance deviation from spec sheet values
- Minimizing downtime is your top priority
I recommend a full new install when:
- Your facility is 20+ years old with legacy wiring
- You're targeting aggressive energy or sustainability certifications (LEED, WELL)
- You want full IoT integration with ABB Ability—and the existing control infrastructure can't support it
- You need guaranteed compliance with current local electrical codes
A final note: this works for about 80% of cases. If you're in that other 20%—say, a historic building with restrictions on fixture replacement, or a facility running 24/7 with no window for downtime—your decision framework changes. That's a conversation worth having with a qualified electrical engineer who's seen your specific conditions.
Pricing note: retrofit kits typically run 30–60% of a fully new fixture cost, but always verify with current vendor quotes. As of early 2025, ABB retrofit solutions range from approximately $45–$120 per fixture for emergency units, depending on specification.