Channel letters: front-lit, halo-lit or non-lit, and how they go on the wall

Channel letters are the separate, three-dimensional letters you see on plaza sign bands and shop fascias. Each one is built on its own, so the sign can follow your logo and lettering exactly. They can glow from the front, glow onto the wall behind them, or have no lights at all. They can be fixed straight to the wall or carried on a metal box called a raceway. This guide explains each choice for storefront owners, and the Toronto and Ontario rules to ask about.

What a channel letter is made of

A channel letter is a shallow, letter-shaped box with three parts. The face is the front you read. The returns are the sides, bent to follow the outline of the letter; their width sets how deep the letter is. The back closes the box against the wall and has holes for the mounting hardware and wiring. Returns are usually aluminum, stainless steel or plastic, according to Sign Media Canada's guide to modern channel letters.

The same guide describes a front-lit letter as working like a box with a lid you can take off. The face comes off for service, and the LEDs inside are glued to the back. Most channel letters today are lit with LEDs, though neon and decorative bulbs are still used now and then (Sign Media Canada).

LEDs changed how deep a letter needs to be. In the neon era, cans had to be at least 5 in (127 mm) deep. With LEDs, a 2017 Sign Media Canada article on designing for LED illumination puts face-lit letters as shallow as 1.5 in (38 mm) and halo-lit letters under 1 in (25 mm). A 2018 article from the same magazine called a 5 in return standard and said 3 in returns were becoming more common (Sign Media Canada, LED challenges, page 2). Depths vary by maker and design, so ask for the depth on your drawing.

Front-lit letters: the face glows

Front-lit letters, also called face-lit, are the most familiar kind. The face is a translucent material, usually acrylic or polycarbonate, that spreads the light out. The back is opaque, usually aluminum or a composite panel, and the LEDs sit on it facing forward (Sign Media Canada). At night the whole face of each letter lights up, so the words read clearly from across the road.

Faces can be translucent acrylic in almost any colour. There is also day/night acrylic, which shows one colour in daylight and another when lit. For logos with detail, the face can carry translucent printed inks or translucent vinyl where it should glow, and opaque paint or vinyl where it should not. Translucent paints are another option (Sign Media Canada).

Colour affects how bright a lit face looks. A 2018 Sign Media Canada article on lighting channel letters calls red an excellent choice and says white gives strong visibility at night. It warns that dark blue and dark green absorb much of the light rather than letting it through, while lighter greens work well. Burgundy, usually a vinyl colour, can also cause problems. If your brand colour is dark, ask to see a lit sample before you approve the order.

Even light across the face takes some planning. The same series says that painting the inside of the returns with a highly reflective paint makes the letter brighter and reduces hot spots, patches of the face that look brighter than the rest. It suggests letter strokes at least 1.5 in (38 mm) wide so the LED modules fit, and roughly one strand of modules for each 5 in (127 mm) of inside width, depending on the module (Sign Media Canada, page 2). Very thin script or tiny letters can be hard to light evenly, so ask how your logo will be handled.

Trim cap or trimless

On a classic front-lit letter, a plastic edge called a trim cap is glued round the face and screwed through the returns to hold the face in place (Sign Media Canada). Trimless letters drop the trim cap and hold the face with an internal lip, routed faces or hidden clips, screws and adhesives. The letter maker Gemini describes its trimless face-lit letter as an acrylic face on aluminum returns with a composite back, assembled with adhesive (Gemini).

A 2025 Signs of the Times article on trimless letters, written by a sign shop owner, sets out the trade-off. Trim cap letters are quick and relatively low-cost to make, and the cap hides small imperfections. But a tight fit is hard to get, gaps or wavy edges can show, custom colours are hard to paint, and the cap can channel water inside the face. The author says trim caps last less long outdoors and fail more often. Trimless letters keep fine detail and sharp points and look cleaner. He finds them best for letters about 6 to 28 in tall, notes that letters over 48 in often need polycarbonate faces, extra internal support or metal retainers, and says trimless is not the cheapest option. Naqsh lists trimless channel letters as one of its styles.

Halo-lit letters: the wall glows

Halo-lit letters are also called reverse-lit or back-lit. Here the parts swap roles. The face is opaque, usually aluminum or stainless steel, and the back is translucent, usually polycarbonate (Sign Media Canada). The light leaves through the back, hits the wall and spreads out round the edges of each letter. At night you see dark letters outlined by a soft glow.

For the halo to show, the letters have to stand off the wall. Graphics Pro cites about 1.5 in as the standard gap. Further out, the outline turns blurry; closer in, there is too little room for the light to spread. Sign Media Canada gives a similar range of 1.5 to 2 in (38 to 51 mm). It warns that mounting too close makes the halo small and harder to read at night, and says a 3 in (76 mm) return is generally specified for halo letters because a 5 in return may not give a bright enough halo (Sign Media Canada, page 3). Spacers or standoffs set that gap (Gemini).

The wall is part of the sign

Because the light lands on the wall, the wall's finish matters as much as the letters. A matte surface with good colour contrast gives a stronger halo. A dark, glossy surface soaks up the light and can mirror the LEDs (Sign Media Canada). Graphics Pro says matte masonry, such as stucco, brick or stone, works best, and that glossy or reflective walls show the modules and mounting hardware. It adds that a wall that is too dark or rough, or a sign seen from a sharp angle, can leave a halo sign hard to read, and that halo signs work best where no strong light competes with them (Graphics Pro).

Coloured walls change the colour of the glow. Sign Media Canada gives the example of a bright yellow wall making a white halo look yellowish, and warns that reflective wall panels can distort the halo's shape. On a reflective wall the LED modules can show in the reflection, especially when the letters are mounted low, close to people walking by (Sign Media Canada, page 3). Halo letters set close together may also need wider spacing so their glows don't run into each other (Sign Media Canada).

So before you choose halo lighting, look hard at the wall it will sit on. Send a close photo of the surface with your quote request, and say if the wall is glass, polished panel, dark brick or painted in a strong colour.

Front and back-lit together

You don't have to pick only one. A sign can mix both: some letters face-lit and others halo-lit, or only parts of a logo lit (Sign Media Canada). A sign can also combine halo and face lighting, and Graphics Pro suggests that combination where a halo sign would be seen from a sharp angle (Graphics Pro). Naqsh lists front and back-lit channel letters as one of its styles.

Non-lit letters: no wiring at all

Non-lit letters, also called dimensional letters, have the same three-dimensional look without lights. The Naqsh catalogue lists stainless steel, acrylic, epoxy resin-filled and 3D plexi letters among its styles. Because there is nothing to wire, the electrical steps later in this guide don't apply. The building permit question does, though: Toronto says a sign installed on a building needs a sign permit and a building permit, lit or not (City of Toronto).

Non-lit letters are usually fixed with threaded studs set into holes drilled in the wall. Gemini's mounting guide calls studs a strong, permanent option for surfaces such as brick, block, concrete and drywall, and describes spacers that hold letters off the wall for a floating look or to even out an uneven surface. For light letters indoors on smooth surfaces, it lists double-sided tape backed by adhesive, with no drilling (Gemini). A non-lit sign depends on daylight or on nearby lighting after dark, so think about when your customers pass.

The three types side by side

How channel letters are mounted

There are three common ways to put channel letters on a building, according to Sign Media Canada. Flush (or direct) mounting fixes each letter straight to the wall and is the most common. A raceway is a metal box mounted on the wall that holds the wiring, power supplies and other electrical parts, with the letters fixed to its front. A backer is a panel or cabinet that the letters sit on or show through, with the electrics inside it or behind the wall.

Flush mounting

With flush mounting the letters seem to sit right on the building, with nothing between them. The cost is holes. A 2014 Sign Media Canada article on raceways and wireways says flush mounting means the most holes drilled into the façade of the three methods, because each letter is fixed and wired on its own. Halo letters use standoff spacers to hold them off the wall (Sign Media Canada).

The wiring runs through the wall, and the power supply usually sits behind it, so someone needs to reach the back of that wall. Graphics Pro advises planning this during the site survey, notes that drywall may have to come off inside, and warns never to splice wires inside the wall but to leave enough wire to reach the power supply or an accessible spot (Graphics Pro). If the area behind your fascia is a finished office, a closed ceiling or a neighbour's unit, say so early.

Raceway mounting

A raceway is a long, rectangular box fixed along the wall. It holds the wiring and electrical parts, so the wall needs fewer holes than with flush mounting. It is often painted to blend with the façade, and its top can come off for quick access to the parts inside (Sign Media Canada). Gemini also notes that one raceway can carry many letters, which cuts down on wall penetrations and makes servicing simpler (Gemini).

The downsides: the box is visible, and it adds depth. Sign Media Canada notes that a raceway can push a sign beyond the distance it is allowed to stick out from the wall. A slimmer option is a wireway, a narrow enclosed channel; it needs more holes than a raceway but fewer than flush mounting, and its parts usually sit inside the wall, so replacing them can mean taking the whole sign down. The same article says some property owners require raceway mounting to limit drilling, and landlords sometimes ask for wireways where by-laws limit how far a sign can project (Sign Media Canada).

Backer panels

On a backer, the letters are fixed to a board, or show through an opening in the frontage, and the power supply and electrical hardware sit inside the backer cabinet or behind the façade (Sign Media Canada). A backer can help where the wall itself is a poor surface for letters or where you want a block of colour behind them. Naqsh also makes custom signs such as push-thru signs and backlit acrylic panels if a full cabinet suits your storefront better.

Permits in Toronto

This section covers the City of Toronto only, from the City's own pages, checked on 27 October 2026. Toronto Building administers the City's Sign By-law, and the City sorts signs into two groups: first party signs that identify a business on the premises, and third party signs that advertise something not related to the premises (City of Toronto sign information). A storefront sign with your business name is a first party sign.

The City says that any time a sign is installed on a building or into the ground, a sign permit and a building permit are required (City of Toronto, general sign inquiries). Window signs follow different rules on that page. If your store is in another municipality, such as Pickering, Ajax or Oshawa, its rules are separate; don't apply Toronto's.

What a first party sign permit application asks for

The City's first party sign permit page lists what goes in. In short:

• Forms: an application to construct, the first party sign permit application, a letter of authorization from the property owner, designer information if a professional engineer or architect did not design the sign, and a declaration about overhead electrical conductors.
• Drawings: to scale, fully dimensioned, signed and dated, showing a cross-section, an elevation and a site plan with the sign's location.
• For wall signs: a cross-section showing the sign's depth and the building's structural capacity, plus the sign's weight and attachment details.
• Lighting details: notes and details on the lighting design and illumination levels.

The same page says applications are emailed to the City's Express Services, and that applications for three or fewer signs on properties that are not heritage-protected are reviewed within three business days of being entered in the system. Heritage-protected properties don't qualify for that express review. A sign that doesn't conform to the by-law needs a variance, which starts with a Preliminary Project Review, and a sign over the public right-of-way needs separate approval from Transportation Services. Fees are charged per square metre of sign area, with a minimum; check the City's current fee page rather than an old figure.

Inspections close the permit. For wall signs, the City requires a final inspection and an installer's report confirming the work matches the permit plans. You book it online with your permit number and the name of the person who will meet the inspector (City of Toronto, sign inspections).

When a lit sign may be on

Toronto's Sign By-law also limits lighting. In the consolidated Chapter 694 dated 3 June 2024, section 694-18 says, in short, that signs may not be lit between 11 pm and 7 am unless the sign is a first party sign for a business that is actually open then, with exceptions for a few special sign districts downtown. The cut-off is 9 pm in residential sign districts and within 30 metres of a residential premises, with the same open-business exception. First party signs must not be lit while a smog alert is in effect. Signs must not be up-lit or throw light onto neighbouring premises in residential, commercial-residential, institutional or open-space sign districts, and the section caps brightness at 5,000 nits by day and 300 nits at night. Ask whether your sign can be dimmed or put on a timer, and check the current by-law text for your address.

Electrical safety in Ontario

Lit channel letters are electrical equipment, and in Ontario that brings two separate requirements: the equipment must be approved, and the connection must be done and reported properly. The City pages above don't cover these electrical steps, so treat them as a separate track from the sign permit.

Approved equipment

Ontario's Electrical Safety Authority (ESA) says electrical products sold or used in Ontario must be approved, under Rule 2-022 of the Ontario Electrical Safety Code. Signs and displays are specifically named among products that still need approval even when they run from a low-power Class 2 supply (ESA, exceptions to product approval).

Approval shows as a mark or label from an accredited certification or evaluation agency. ESA publishes the list of marks it recognizes, which includes marks from CSA, UL and Intertek among others, plus field evaluation marks for equipment checked on site. It states that installing and connecting unapproved electrical equipment is against the law (ESA, recognized approval marks).

Two standards come up when people talk about electric signs. In Canada, the sign standard is CSA C22.2 No. 207, Portable and stationary electric signs and displays; its 2015 edition was updated to cover LED light sources and retrofit kits (Intertek). In the United States, the standard is UL 48, Electric Signs; UL says its program for custom signs covers channel letters, among others, for dry, damp or wet locations (UL Solutions). For a sign in Ontario, what counts is that the label is one ESA recognizes, so ask which mark your letters will carry and check it against ESA's list.

Connecting the sign

ESA's guidance for business and property owners says anyone you hire to do electrical work must be a licensed electrical contractor. Most electrical work needs a notification of work filed with ESA, before or within 48 hours of the start of the work, by the person doing it. Work must meet the Ontario Electrical Safety Code, and ESA reviews it (ESA, property owner obligations).

ESA tells customers to ask for the contractor's ECRA/ESA licence number, which should appear on their vehicle, business card and estimate, and to check it with ESA's contractor search (ESA, hiring a licensed electrical contractor). That page is written for homeowners, but the licensing rule on the business owners' page is the same.

What to send for a quote

For channel letters, Naqsh asks for four things: your logo or the wording, the width of the wall or sign band, a photo of the storefront, and whether you want the letters lit. From the sections above, a few more details help any sign company quote the right build:

1. Logo or wording. Send the best file you have; our artwork guide explains which file types work best.
2. The sign area. Width and height of the wall or sign band, even roughly.
3. Photos. One straight-on photo of the storefront from across the street, one wider photo from the way customers arrive, and a close-up of the wall surface.
4. Lighting. Front-lit, halo-lit, both or non-lit, and your brand colours.
5. The wall. Its material and finish (brick, stucco, metal panel, glass) and its colour, which matter most for halo lighting.
6. Behind the wall. Whether there is access to the back of the fascia, or a finished ceiling or office in the way.
7. Rules. Your landlord's sign criteria and any mounting method they require.
8. What comes down. Whether an old sign needs to be removed first.

If you are not sure how tall the letters should be, our viewing distance tool gives a starting height from how far away people will read the sign.

Naqsh quotes installation together with the letters. Quotes are free and come back same day. Production time depends on the product — your quote gives you a firm date before you approve anything. Nothing is made until you approve the proof. Send your photos and logo through the quote form or by WhatsApp or email from our contact page.

Already have a lit sign?

If your current letters flicker, are partly out or have a cracked face, a new sign may not be needed. Naqsh's sign repair service covers repairs, maintenance, new faces and LED retrofits, which replace old fluorescent or neon lighting inside the sign with LED. Send a straight-on photo, a close-up of the problem and the address.

Questions to ask before you approve

• What are the face, return and back materials, and how deep are the letters?
• Trim cap or trimless, and how does the face come off for service?
• For halo letters: how far off the wall will they sit, and how will my wall's colour and finish affect the glow?
• For dark brand colours: can I see a lit sample?
• Flush, raceway or backer, and how many holes go into the wall?
• Where does the power supply go, and how will it be reached later?
• Who prepares and submits the permit application?
• Which approval mark will the letters carry, and who files the ESA notification of work?
• Does the quote include removing the old sign, installation and the electrical connection?