How long do the LEDs last?

Good LED modules run for years of nightly use. The power supply is usually the first part to be replaced.

Can an existing unlit sign be lit?

Sometimes. Back-lighting can be added to metal letters if they can be stood off the wall; a flat board usually needs rebuilding.

Do lit signs use much electricity?

LED signs draw little power compared with older tube lighting. The consumption depends on the size of the sign.

Guide Updated 3 October 2026 2 minutes read

Types of LED sign boards, and which lasts longest

Short answer

There are three main types: front-lit letters, back-lit letters and lit boards. Back-lit metal letters generally last longest, because the LEDs sit behind solid metal and nothing on the face can fade.

Front-lit letters

Each letter is a shallow box with an acrylic face and LEDs inside. The whole face glows in the brand colour. This is the brightest type and the easiest to read from a distance, which is why it suits shop fronts on busy roads. The acrylic face is the part that ages.

Back-lit letters

The letter is solid, usually stainless steel or aluminium, and stands off the wall on spacers. LEDs behind it light the wall, so the letter appears as a dark shape in a halo. It is quieter and reads as more premium. It needs a plain, light wall behind it to work.

Indo Asia Heritage Madikeri letters back-lit at night — Letters lit on a dark granite wall at night

Lit boards

A light box is a frame with LEDs inside and a printed or cut face. A board with raised letters combines an ACP background with lit letters or a lit logo on it. Boards are the economical way to light a large area.

Lit direction totem with arrows to Car Parking, Paved Deck and Festival Lawn — Arrows and lettering lit through a dark face

Outline and neon-style signs

Flexible LED strip can draw a line of light, in the manner of neon. It is used for logos and decorative lettering more than for main name boards.

What fails first

In any lit sign the electrical parts age before the structure does. Power supplies fail before LED modules; modules in a sealed, well-ventilated letter outlast those in a damp one. A sign that can be opened for service will last longer than one that cannot.

Choosing between them

For reading distance and brightness, front-lit. For a calmer look on a good wall, back-lit. For a large name on a budget, a lit board. Ask to see each lit and unlit before deciding.

A showroom name in lit letters over the entrance, at night

This guide is about: LED Sign Boards & Illuminated Name Boards