Sign lighting & LED upgrades

If your sign looks right by day but disappears at night, you may not need a new one. Lighting the sign you already have is often the cheaper route to being seen after dark, and it suits painted fascias, tray signs and flat-cut lettering never designed to glow. One slim fitting can change how a frontage reads on a winter evening.

The same thinking applies to old lit signs. A lightbox still running fluorescent tubes, or a tired glass-neon sign, can usually be converted to LED for lower running costs and fewer call-outs. This page explains the fittings, how to aim them without dazzling drivers or neighbours, switching and timers, and why adding light to a sign can itself need advertisement consent.

What kinds of sign lighting are there?

Four fittings cover most frontages. LED trough lights are slim linear fittings on short arms above the fascia, washing the whole sign evenly from the top. Swan-neck spotlights have curved arms with individual heads and suit traditional and painted signs. Linear wall washers sit close to the sign and graze light across it, and concealed LED strip can hide under a cornice or canopy edge.

Each changes the look of the building by day as well as by night, so the fitting's finish matters. Black, white and silver housings are usual, matched to the fascia or shopfront frame so they recede in daylight.

• Trough lights: even wash, minimal clutter
• Swan-necks: period character, pools of light
• Wall washers and concealed strip: discreet, modern

How do you avoid glare?

Aim down, shield the source and keep the light on the sign. Fittings above the fascia pointing downwards light the lettering while sending little light into the sky, which is the dark-sky friendly approach. Uplighting spills light upwards and into first-floor windows, so it's a last resort, with shields or louvres.

Evenness depends on distance and beam. Trough lights give the most even wash; spotlights need spacing so their pools overlap rather than leaving dark gaps. Gloss finishes reflect bright streaks back at the viewer, so matt signs light far more evenly. Councils often judge brightness against the ILP's PLG05 guidance.

• Downward aim with cut-off optics
• Fittings spaced so beams overlap
• Warm or neutral white to suit the sign colours

Can old lightboxes and neon go LED?

Usually, yes. In a fluorescent lightbox, the tubes, holders, starters and ballasts come out and LED modules with a new driver go in across the back of the box. The face can stay or be replaced at the same time, provided the box is structurally sound and reasonably watertight.

Glass neon can be remade in LED neon flex following the original lettering, taking the high-voltage transformer off the frontage. The new sign runs at low voltage with no fragile tubes to break. If the sign is being kept for its character, the survey records the details so the replacement follows it closely.

• LED modules spaced to suit the box depth
• Face kept or replaced in the same visit
• High-voltage neon transformer removed

How should sign lighting be switched?

Automatically, so it's on when useful and off when not. A photocell switches the lights on as daylight fades, and a time switch turns them off at a set hour, such as closing time or later in the evening. Together they handle the changing length of the day without anyone touching a switch.

Some consents set hours of illumination, so the timer should match any condition the council applies. The supply comes from a switched, fused connection inside the building, run through the wall to the fittings, and an electrician makes the final connection to BS 7671 and issues the certificate for the circuit.

• Photocell for dusk switching
• Time switch for a set off time
• Manual override switch for late events

Light it or replace it?

Light it, if the sign itself is in good shape. If the fascia is sound, the colours are fresh and you like the design, a trough light or spotlights give you night-time visibility for much less than a new illuminated sign, and the fittings can move to a new sign later.

Replacement makes more sense when the sign is faded, cracked or damaged, the fascia behind it is rotten, or the brand has changed. Glossy panels and signs set deep under a canopy can also be hard to light well from outside. The survey looks at the sign, the wall above and the power supply before recommending either route.

• Keep and light: sound sign, fresh colours
• Replace: faded, damaged, off-brand or rotten behind
• Either way: check consent before ordering

Options and finishes

How much do sign lighting and LED upgrades cost?

Guide prices: £295–£750 + VAT for an LED trough light up to 3 m, £345–£895 + VAT for a set of 3–4 spotlights, and £295–£1,450 + VAT to retrofit an old fluorescent lightbox with LEDs. Prices exclude VAT and are confirmed after survey.

Fascia length and fitting count drive the price, with access height, the cable route and a timer or photocell added where needed. Glass-neon conversions and very large boxes are quoted individually.

Guide prices exclude VAT and are confirmed after survey or artwork check. Basis: LED trough lights, spotlights or LED retrofit for an existing fascia up to about 5 m.

Specification at a glance

Before you ask for a quote

• Photograph the sign by day and after dark.
• Measure the sign's length and the wall above it.
• Note the sign's surface: gloss or matt, flat or raised.
• Look for existing power or an old timer nearby.
• For an old lightbox, count the tubes.