Costs

What an upgrade costs, and what actually moves the number

The honest version: nobody can price this off a floor area, and a quote given over the phone is a guess wearing a number. What you can know in advance is how a quote is built up, which is what you need in order to read one properly.

The two figures worth holding on to

Installed high bay fittings at a few hundred pounds each, and a 200,000 sq ft warehouse at roughly tens of thousands of pounds for fixtures and installation. Everything else follows from the fitting count.

In the order they move a quote

If you are comparing two quotes, work down this list and check both have priced the same thing. Most large differences live in the top four rows.

Driver	What it is	Moves the price
Fitting count	Comes from the lighting layout, not from the floor area. Two buildings of the same size can need very different numbers of fittings.	Most
Mounting height	Sets the output each fitting needs and therefore the specification, and sets the access equipment. The dominant variable in any industrial building.	Most
Access and working hours	Scissor lift, tower or MEWP, whether it can run during operations, and whether the work has to be out of hours.	A lot
Controls	Sensing, daylight dimming and zoning. Adds materially to the capital cost and usually improves the value of the whole job.	A lot
Occupied or empty	An empty building is the cheapest version of the same work. Working around occupiers adds cost for reasons unrelated to lighting.	Some
Existing wiring and gear	Whether the circuits and containment can be reused, or whether a tube swap turns into a rewire because of the ballasts.	Some
Disposal	Fluorescent tubes contain mercury and are hazardous waste. Small line, frequently missing from a cheap quote.	A little

A scissor lift raised to roof level inside a warehouse, positioned beneath a row of high bay light fittings. — Access, not the fitting, is what drives the cost at height. Illustrative image generated with AI. Not a photograph of a building we have worked on.

Ordered by how much each one typically moves a commercial lighting quote. A judgement about which variables matter most, not a measured ranking.

A large shed, as an anchor

A 200,000 sq ft warehouse relamp sits at roughly tens of thousands of pounds for fixtures and installation, and around meaningfully more once controls are included once lighting controls go in alongside. The gap between those two numbers is the decision worth the most thought, because a warehouse is unusually well suited to controls — large areas genuinely empty for long periods, aisles already zoned by the racking, and rooflights to dim against.

Scale that down carefully rather than proportionally. Smaller buildings do not get the same rate per fitting, and a low workshop is a completely different job from a high bay shed even at the same floor area. The floor of the market, not the average job is where the cheapest jobs sit, and they are not distribution buildings.

Payback is around a year under continuous operation, and longer on shorter hours. A quote with a payback figure on it should say what hours it assumed; if it does not, ask.

Cost questions

How much does a commercial LED upgrade cost?

There is no per-square-foot answer that survives contact with a real building, because the cost comes from the fitting count and the access rather than the floor area. Installed high bay fixtures run at a few hundred pounds each, and a 200,000 sq ft warehouse sits at roughly tens of thousands of pounds for fixtures and installation. Your building needs a survey.

Why is one quote half the price of another?

Almost always because they are not the same job. The usual differences are a lamp swap versus a fixture replacement, controls included or not, access and out-of-hours working priced or excluded, and disposal left out. Comparing quotes means first making sure they describe the same work.

What is the payback?

On commercial lighting, around a year under continuous operation, and longer on shorter hours. That is extremely sensitive to operating hours. A building lit sixteen hours a day pays back far faster than one lit eight, so any payback figure that does not state the hours it assumes is not telling you much.

Can you do it for under a thousand pounds?

Sub-£1,000 jobs exist and they are small workshops and single bays — the floor of the market, not the average job. If somebody is pricing a distribution shed at that level they are describing a different building.

Are there grants or funding available?

Funding routes for commercial energy efficiency change frequently and eligibility is specific, so we will not list schemes here that may have closed. Ask the contractor what is currently available for your building type, and check anything you are told against the scheme rules before you rely on it.

Next step

Get a figure for your building

A survey is the only honest way to price this. One commercial contractor comes out, looks at the fittings and the access, and quotes you directly.

Get a quote Estimate the cost first

Or call 07367 293494. Monday to Friday, 9am to 5.30pm.