Light Box Lighting Replacement: An Even Glow Again Without a New Cabinet
A light box (cabinet sign) that lights unevenly, with dark corners, stripes or sections that no longer glow, looks neglected after dark, even when the face and graphics are fine. Often the cabinet is still sound and only the lighting inside has reached the end of its life.
In that case we keep the cabinet and fit new LED modules. The sign glows evenly again, and removal and reinstallation are included in the price.
- Free site visit & measurement
- Design included
- 2-year warranty
- Own workshop in Calgary
Signs That the Lighting Needs Replacing
Lighting problems are easiest to see at night, from the street, where your customers see the sign. Look for:
- Dark patches, stripes of light or a dim corner on the face
- Flickering, or sections that no longer light at all
- A sign that is clearly dimmer than it used to be
- Uneven colour: one part of the face looks warmer or cooler than the rest
A new face or new graphics will not fix any of this, because the problem is behind the face. The guide how long LED signs last explains how lighting ages and what usually fails first.
Why Replace Only the Lighting
The cabinet stays
You do not pay for a new structure, new fixings on the wall or new electrical work to the building.
Removal and reinstallation included
Taking the sign apart and putting it back together is part of the price, not an extra.
Even light across the face
New LED modules with optical lenses are laid out for your cabinet, so the glow is smooth from edge to edge.
Years of service ahead
The LED modules we use are rated for up to 50,000 hours.
Combine it with a new look
If the face or graphics are tired too, they can be replaced in the same job.
What We Do
Check on site
On the free site visit we open the sign and look at the cabinet, the existing lighting, the power supply and the face, so you know before the quote whether new lighting is the right fix.
Plan the layout
The new LED modules are laid out for the size and depth of your cabinet. The goal is the same as in a new light box: no hot spots and no dark areas.
Power supply
LEDs run from a power supply. If yours needs replacing as well, it is included in the quote.
Back together and lit
The face goes back in, the sign is switched on, and the light is checked across the whole face before we leave.
When New Lighting Is the Right Choice
- The cabinet is solid, square and securely mounted
- There is no serious water damage or corrosion inside
- The lighting is dim, patchy or failing
- You are happy with the size and shape of the sign
If the face is yellowed or cracked as well, add a new acrylic face; if only the artwork is dated, add new graphics. If the cabinet itself is failing, a complete new light box is the honest recommendation.
Permits
New lighting inside an existing cabinet is work on a sign that is already there. According to the City’s sign permits page, “a development permit is not required to: maintain or repair a legally existing sign” (checked 2026-10-28). We confirm the situation for your sign on the site visit.
Price and What Affects It
Lighting replacement is quoted after we have opened the sign. Removal and reinstallation are included, so the quote is the full price for the job.
- Size and depth of the cabinet
- Single-sided or double-sided cabinet
- Whether the power supply is replaced too
- Whether the face or graphics are replaced in the same job
- Access to the sign (height, obstacles)
Lighting replacement is not in the online calculator; send a photo of the sign and we will give you a first idea of the budget. The new lighting parts and our work carry a 2-year warranty; the existing cabinet and wiring are not covered.
Is your sign dark in places?
Send a photo of the sign at night. We will tell you whether new lighting is likely to fix it and confirm on a free site visit.
Lighting Replacement Questions
Yes. Taking the sign apart, fitting the new lighting and putting the sign back are included in the price.
Yes, if the cabinet is sound. We open it on the site visit and check what is inside before quoting.
Yes. New lighting, a new face and new graphics can be combined in one job.
Dark spots almost always come from the lighting, so new LED modules laid out for the cabinet are the usual fix. We confirm the cause on the site visit.
According to calgary.ca, a development permit is not required to maintain or repair a legally existing sign.
Sources
- City of Calgary: Sign permits, accessed 2026-10-28