Reuse the sign. Replace the lighting system.
LED sign retrofits planned for even light, service access, and the sign you already own.
S2 converts serviceable cabinets, channel letters, and other illuminated signs from fluorescent, neon, outdated LED, or failed lighting layouts to current LED systems.
A retrofit is more than sticking new modules where old lamps used to be. The existing depth, face, reflectivity, wiring, water condition, power-supply location, connected load, and access all affect whether the finished sign lights evenly and remains repairable.
Real S2 process: LED modules installed in a controlled grid inside an existing sign cabinet.
Retrofit versus repair
What does an LED retrofit actually replace?
A repair corrects a specific failure: a power supply, a group of LED modules, a broken wire, a photocell, a damaged socket, or another isolated component. A retrofit replaces the broader lighting system while preserving the parts of the sign that still have value.
In a fluorescent cabinet, that may mean removing lamps, sockets, ballasts, and old wiring. In neon or channel letters, it may mean removing transformers, electrodes, tubing, outdated modules, and improvised wiring. The new LED system is then laid out for the actual cabinet or letter depth.
Reuse is the objective—not the assumption.
S2 evaluates the cabinet, faces, letter bodies, backs, trim, water condition, wiring, access, and permitted sign location before recommending a retrofit. A structurally failed sign should not be preserved simply because LEDs will fit inside it.
Signs worth preserving
Which existing signs are good LED-retrofit candidates?
The best candidate has a valuable structure, usable faces or letters, workable access, and a lighting system that is older or less reliable than the sign body around it.
Diagnose before quoting the cure
A dark sign can have several very different causes.
A failed branch circuit, disconnect, photocell, power supply, ballast, transformer, module group, broken wire, water-damaged connection, damaged face, or access problem can produce similar customer symptoms. The sign may be completely dark, partially dark, dim, striped, flickering, discolored, or inconsistent from one letter to the next.
- Confirm sign type, voltage, controls, and building-power condition
- Identify whether the failure affects one component or the full system
- Inspect faces, backs, trim, retainers, seams, drainage, and water intrusion
- Review cabinet depth, letter stroke, module clearance, and reflective surfaces
- Check wiring condition, grounding, splices, power-supply location, and access
- Determine whether the existing sign remains structurally and visually worth keeping
A retrofit should solve the reason the old system became unreliable. Installing new LEDs into a wet, corroded, inaccessible, or poorly wired sign simply gives the old problem new components.
Light distribution
Even brightness comes from geometry, not module count alone.
LED modules have beam patterns. The light needs enough distance to blend before reaching the face, and the rows need spacing that matches the cabinet depth, face material, color, print density, and desired output.
In channel letters, the letter stroke and return depth control the available layout. In cabinets, edge shadows and wide uninterrupted faces become more important. Power supplies must be sized for the connected load and placed where heat, water, and future service can be managed.
Retrofit by sign type
The same LED module does not belong everywhere.
Cabinets, channel letters, push-thru signs, monuments, and pylons create different depths, access conditions, face materials, and service risks.
| Existing sign | Typical old system | Retrofit focus | Common additional work |
|---|---|---|---|
| Rigid-face cabinet | Fluorescent lamps, older LEDs | Even face coverage, edge shadows, ballast removal, access. | New face, retainers, reflectors, wiring, drainage. |
| Flex-face cabinet | Fluorescent lamps, older LEDs | Large-area module grid and correct distance to flexible face. | Face tension, clips, service doors, cabinet cleaning. |
| Front-lit channel letters | Neon, early LEDs, failed modules | Stroke-based layout, face brightness, trim and return condition. | Faces, trim cap, backs, penetrations, power-supply relocation. |
| Halo-lit letters | Neon or older LEDs | Reflected-light consistency, standoff, wall condition, back clearance. | Clear backs, spacers, mounting, light blocking, wall repair. |
| Push-thru sign | Fluorescent or LEDs | Controlled edge/face glow and prevention of light leaks. | Acrylic replacement, routed face repair, block-out. |
| Monument / pylon cabinet | Fluorescent or older LEDs | Elevated or ground access, double-face depth, weather and controls. | Faces, tenant panels, photocell, wiring, structural access. |
The S2 LED-retrofit process
Inspect, remove, correct, install, and test.
The work may happen in place, in the shop, or in both locations depending on sign access, face size, cabinet condition, and how much fabrication is required.
Photos + symptoms
We start with the address, daylight and nighttime photos, age, sign type, access, and what the lighting is doing.
Diagnostic survey
Power, controls, faces, cabinet or letter condition, water, wiring, components, and service access are inspected.
Repair-versus-retrofit decision
We identify whether a limited component repair, full retrofit, re-face, structural work, or replacement is the responsible path.
Layout + scope
LED type, module spacing, power supplies, wiring, removals, corrections, face work, access, and permit needs are defined.
Old-system removal
Lamps, ballasts, transformers, neon, failed modules, abandoned wiring, and unsafe components are removed as the scope requires.
Cabinet or letter correction
Reflective surfaces, water paths, backs, retainers, wiring routes, penetrations, and access issues are corrected before new LEDs are installed.
LED installation
Modules, wiring, power supplies, labels, disconnects, and controls are installed using the approved layout and applicable UL processes.
Light test + field verification
The sign is tested for even output and then verified at the site under the conditions the customer will actually see.
Project example · Thornton, Colorado
Fodor Billiards: every exterior letter converted from glass neon to 12-volt LED.
S2 no longer repairs traditional glass-neon systems or small beer signs. For commercial signage with useful letter bodies, faces, and mounting, conversion to LED can preserve the sign while replacing the obsolete lighting system.
This project is an example of commercial neon-to-LED conversion, not a promise of holiday or after-hours service. S2 does not restore or service glass neon itself.
When replacement is better
A retrofit should preserve value—not postpone a larger failure.
S2 will recommend replacement when the existing structure, face, access, or permitted use no longer supports a sensible retrofit. That recommendation may cost more now, but it avoids investing in lighting that has to be removed again when the cabinet or letters fail.
- Severe corrosion, cracked welds, loose framing, or failed mounting
- Persistent water intrusion that cannot be corrected economically
- Faces, trim, retainers, backs, and paint all requiring replacement
- Sign depth or letter stroke that cannot produce acceptable light
- Unsafe wiring, inaccessible components, or repeated improvised repairs
- A sign that is too small, dated, damaged, or wrong for the current property
- Code or permit conditions that make substantial alteration impractical
Price and schedule
What changes the cost of an LED retrofit?
Retrofit pricing depends on what has to be removed, what can be preserved, how the sign is accessed, and whether the faces, cabinet, letters, wiring, or controls need work at the same time.
- Sign type, size, depth, and number of letters or faces
- Existing fluorescent, neon, LED, ballast, or transformer system
- Module quantity, optics, color, and power supplies
- Removal and disposal of old components
- Wiring condition, grounding, disconnects, and controls
- Water intrusion, corrosion, reflectivity, and cabinet cleaning
- New faces, trim, retainers, backs, or acrylic elements
- Field work versus shop work
- Bucket truck, lift, crane, roof, traffic, and access requirements
- Permit, inspection, and applicable UL labeling requirements
- Branch-circuit or electrician work outside the sign
- Travel and installation logistics
S2 provides a scope after diagnosis. That prevents a “retrofit price” from quietly excluding the face, wiring, access, or water problem that caused the sign to fail in the first place.
Colorado LED sign service
Retrofits for Loveland, Northern Colorado, Denver, and Colorado Springs.
S2 Sign Company diagnoses and retrofits illuminated signs from our Loveland shop. We regularly serve Northern Colorado and take qualifying retrofit and repair projects throughout the Denver metro area and Colorado Springs.
Send the address and photos first. In many cases, the existing sign style and failure pattern are visible enough to plan the right diagnostic visit and avoid wasting time on the wrong equipment or parts.
LED retrofit FAQs
Questions about fluorescent, commercial neon-to-LED conversion, old LEDs, and sign reuse.
These answers cover the decisions that shape most early conversations. The building, jurisdiction, existing conditions, and sign design still determine the final recommendation.
What is an LED sign retrofit?
An LED retrofit replaces an older or failed sign-lighting system while preserving serviceable channel-letter bodies, cabinet structures, faces, supports, or other sign components. The retrofit includes removal, layout, wiring, power supplies, mounting, testing, and any needed corrections to the existing sign.
Can fluorescent sign cabinets be converted to LED?
Yes, many can. S2 removes lamps, sockets, ballasts, and outdated wiring, then evaluates cabinet depth, face condition, water intrusion, reflectivity, and access before installing a properly spaced LED system.
Can neon channel letters be converted to LED?
Often. The letter depth, stroke width, backs, faces, trim, penetrations, and desired appearance determine whether LED modules can replace the neon system effectively. S2 does not repair or restore glass neon. For commercial signs, serviceable letter bodies and faces can be evaluated for conversion to 12-volt LED modules.
Is a retrofit the same as replacing failed LED modules?
Not necessarily. Replacing one failed module or power supply is a repair. A retrofit is a broader lighting-system update, usually involving a new layout, new power supplies, removal of older components, and correction of service or wiring issues.
Will an LED retrofit make the sign brighter?
It can improve consistency and restore intended brightness, but the goal is not maximum brightness at any cost. Cabinet depth, face color, print density, letter stroke, module optics, spacing, and local illumination rules determine the appropriate output.
Does an LED retrofit require a permit or UL label?
Requirements depend on the scope and jurisdiction. S2 uses UL-listed components, follows the applicable UL retrofit and labeling processes, and determines whether a permit or inspection applies to the project.
When is a retrofit not worth doing?
Replacement may be the better choice when the cabinet or letters are structurally damaged, badly corroded, leaking extensively, difficult to service, undersized for the property, or paired with faces and graphics that also need complete replacement.
How long does an LED retrofit take?
The schedule depends on diagnosis, access, sign type, module and power-supply availability, face or wiring repairs, permitting if required, electrical condition, weather, and whether the work is completed in the shop or at the site.
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Start with what you know
Send a photo of the sign, tell us what it is doing, and include the address.
A daylight photo, a nighttime photo, and a short description of the failure are often enough to identify the likely sign type and next diagnostic step. We can determine whether the practical path is repair, re-face, retrofit, or replacement.
- Project address and access notes
- Daytime photo of the complete sign
- Nighttime photo showing the failure
- Approximate age, if known
- Any prior repair history
- Which sections are dark, dim, flickering, or discolored
The form sends directly to S2. You can also email hello@s2signs.com.