Channel letters are individually fabricated 3D letters, and how they're lit changes their entire character even when the letter shape and size stay identical. The three main approaches - front-lit, back-lit, and halo-lit - each suit different brand looks and budgets.

Front-lit channel letters are the most common and most recognizable style: the face of each letter glows, typically with an acrylic front and LED modules inside illuminating that face directly. This is the classic, bold, highly visible storefront sign style - the letters themselves are the light source, readable clearly from a distance day or night. It's the go-to choice when maximum visibility and a strong, confident brand presence matter most.

Back-lit (also called reverse-lit or halo-lit, though halo-lit is technically its own variant) channel letters have an opaque face, with light escaping from behind the letter and creating a soft glow - a halo - around each letter's silhouette against the wall it's mounted on. This produces a more subtle, premium, boutique feel rather than a bold announcement. It suits businesses like upscale restaurants, boutique retail, and professional services where a softer, more sophisticated presence fits the brand better than a bright, direct-lit sign.

True halo-lit letters combine both effects to some extent, or specifically refer to the halo/glow effect around solid letters, and are popular for exactly the reason above - they read as premium and are often used at night specifically for their ambient, architectural lighting quality rather than raw visibility.

Raceway-mounted channel letters are a practical variant worth knowing about regardless of which lighting style you choose - the electrical components sit in a housing (the raceway) mounted behind the letters rather than recessed into the wall, which is significantly simpler and cheaper to install, particularly on walls where recessing electrical components isn't practical. The visual tradeoff is a visible mounting bar behind the letters, which matters more on some wall finishes than others.

Depth affects both letter styles - deeper letters (typically measured in inches of "return" depth) create a more three-dimensional, substantial look and allow for a more pronounced halo or edge glow, while shallower letters are more budget-friendly and suit smaller signage or tighter mounting spaces.

The right choice comes down to what you want the sign to do: front-lit for maximum visibility and a bold brand statement, back-lit or halo-lit for a premium, understated presence, and raceway mounting as a cost consideration that applies regardless of which lighting style fits your brand. Sharing your storefront photo along with your general brand feel - bold and visible versus refined and subtle - is usually enough to point toward the right combination.