Creating tailored lighting solutions for offices, retail, residential, and commercial interiors. Our calculation-led designs balance the requirements of each space with practical, standards-compliant layouts that reduce coordination issues and rework.
Interior lighting design carries a wider range of requirements than most other lighting disciplines, because the brief changes with the space: an office needs task-level illuminance suited to a full working day, a retail unit needs lighting that supports the product and the brand, and a residential interior needs neither of those things imposed on it. HLS Consultants is a specialist interior lighting design consultancy, providing calculation-led lighting design for commercial, residential, retail, and workplace environments across the United Kingdom, Ireland, and the Middle East.
Whether you're an engineering consultancy needing design capacity for an interior lighting package within a wider fit-out, a Tier 1 contractor delivering lighting as part of a commercial fit-out contract, a local authority lighting a civic or office building, or a developer fitting out retail or residential units, our interior lighting design service is built around one outcome: a lighting layout calculated to the right standard for the space, engineered to reduce the risk of rework at coordination stage.
HLS Consultants is a design-only lighting consultancy — we do not supply luminaires and we do not carry out installation, electrical connection works, or statutory approval submissions. What we deliver is the technical backbone of a compliant interior lighting scheme: the design, the calculations, the verification, and the documentation your team, contractor, or fit-out programme needs to move a scheme forward.
Our interior lighting design service covers commercial offices, retail units, workplace environments, and residential interiors, for both new build fit-outs and refurbishment or retrofit projects — including relighting of existing interiors as part of an LED conversion or a change of use. This makes the service equally relevant whether a space is being lit from scratch as part of a new fit-out, or an existing interior is being upgraded to current lighting and energy efficiency expectations.
Workplace and commercial interiors are governed by specific illuminance requirements under BS EN 12464-1, which sets minimum lux levels, uniformity, and glare control by task and space type — an office desk, a retail till point, and a warehouse aisle each carry a different requirement. Get the calculation wrong, and the space either under-delivers for the people using it, or the fit-out over-specifies fixtures and running cost the brief never required. Residential interiors carry a different brief entirely: there's no workplace classification to meet, and the design has to serve how a space is actually lived in, not a task-based lux target.
This is the distinction a specialist interior lighting design consultancy is built to hold. HLS Consultants calculates commercial, retail, and workplace interiors against BS EN 12464-1 from the outset, and designs residential interiors against the layout, use, and character of the space rather than importing a workplace standard that was never meant to apply to a home.
Interior lighting design generally falls into one of two categories. New build fit-out schemes — a new office floor, a new retail unit, a new residential development — start from a clean design brief, where the lighting layout is calculated directly from the space plan and its intended use. Refurbishment and retrofit schemes start from an existing interior, often one lit to an older standard, with ageing fixtures, or with a layout that no longer matches how the space is actually used following a change of tenant or change of use.
HLS Consultants designs for both. On new build fit-outs, we calculate the lighting layout from the space plan and task requirements from first principles. On refurbishment and retrofit schemes — including LED conversion and relighting following a change of use — we design around the existing structure and ceiling grid wherever possible, flagging where a genuine change in fixture position or specification is required by the calculation rather than defaulting to a full redesign.
workplace space is lit to a generic lux target rather than the task-specific requirement BS EN 12464-1 actually sets for that zone, and the result under-delivers where it matters most — desks, till points, inspection areas. A retrofit reuses an existing fixture layout without recalculating for a new use or occupancy pattern, and the space ends up over- or under-lit for what it's now being used for. Lighting design proceeds without coordination with the wider fit-out or M&E package, resulting in fixture positions that clash with ceiling services, partitions, or joinery once both designs reach the same drawing.
Each of these is a calculation or coordination failure, not a technical one — and each is avoidable with a design process that calculates to the correct task-based standard from the outset and coordinates directly with the wider fit-out and M&E design team. That's the process HLS Consultants applies to every interior lighting scheme, regardless of scale or region.
Every interior lighting scheme we design follows the same structured, verifiable process — from the space plan you provide through to a fully checked documentation package ready for coordination and construction issue.
You supply the space plan, floor layout, and ceiling grid or structural data for the interior. We carry out desktop assessment of the layout and intended use — no site visit is required from HLS directly. This keeps the design process fast to start and easy to run alongside your fit-out or architectural team’s own workload.
Photometric calculations are carried out first, using Lighting Reality and DIALux, to establish the lux levels, uniformity, and glare control required for the space’s use — under BS EN 12464-1 for commercial and workplace zones, or against the layout and character brief for residential interiors. Only once the calculation is correct do we develop the layout in CAD and BIM, coordinated to the ceiling grid, partitions, and wider fit-out. Calculating before modelling means the layout reflects a design that’s already been verified, not one adjusted after the drawing is issued for coordination.
Fixture and luminaire specification is selected to meet the required lux levels and uniformity for the space’s use, balanced against ceiling void constraints, energy efficiency targets, and the wider fit-out’s specification standard.
Calculations and layout are checked against BS EN 12464-1 for commercial and workplace interiors, or against the design brief for residential interiors, before issue. This verification step happens before the scheme is issued for coordination, not after a clash or a lux-level shortfall is flagged on site.
The final documentation package is issued in CAD files, PDF documentation, and inventory/schedule data in spreadsheet format — structured to be used directly in your fit-out coordination or construction process, without your team needing to reformat or rebuild it first.
HLS Consultants designs to the specific standards relevant to interior lighting in each region, applying the correct standard for the space type rather than a single generic approach
Confirming which standard applies — BS EN 12464-1 for a commercial or workplace brief, or a character-led brief for a residential interior — with you at the outset of every engagement means there's no ambiguity later — the scheme is designed once, to the right requirement for the space, rather than adjusted after a coordination clash or a lux-level query.
Interior lighting design work reaches us through several different routes, and we structure the engagement around how you actually need to use the output.
We provide design capacity for interior lighting packages that sit within a wider fit-out or building services scheme you’re delivering, calculated to the same standard your own team would apply if resourced to take it on internally.
Interior lighting design is delivered as part of a commercial or residential fit-out contract, sequenced to your build and coordination programme rather than delivered as a disconnected specialist workstream.
Interior lighting design is delivered as part of a commercial or residential fit-out contract, sequenced to your build and coordination programme rather than delivered as a disconnected specialist workstream.
We support interior lighting design for civic and office buildings, calculated to BS EN 12464-1 workplace requirements and packaged for straightforward technical sign-off within your own approval process.
We support interior lighting design for civic and office buildings, calculated to BS EN 12464-1 workplace requirements and packaged for straightforward technical sign-off within your own approval process.
We deliver interior lighting design for the commercial, retail, and residential units within a wider development, coordinated with the fit-out specification for each unit type.
We deliver interior lighting design for the commercial, retail, and residential units within a wider development, coordinated with the fit-out specification for each unit type.
We provide design capacity for interior lighting packages that sit within a wider fit-out or building services scheme you’re delivering, calculated to the same standard your own team would apply if resourced to take it on internally.
No — BS EN 12464-1 governs commercial, retail, and workplace interior lighting, but it isn't a residential standard. For homes, we design to the layout, use, and character brief for the space rather than importing a workplace classification that wasn't built for it.
Yes — we produce CAD and BIM-coordinated documentation designed to sit within a wider fit-out or M&E design package without rework at coordination stage.
Yes, both are covered — including LED conversion and relighting projects following a change of tenant or change of use, where we design around the existing ceiling grid and structure wherever possible.
No — we work from the space plan, floor layout, and ceiling grid or structural data you supply, plus desktop assessment of the intended use. Where a physical visit is genuinely required, we coordinate it through our delivery partners in the UK and Ireland on a chargeable basis.
We're a design consultancy — fixture supply, installation, and electrical connection works sit outside our scope. What you receive is CAD files, PDF documentation, and inventory/schedule data in spreadsheet format, structured to be usable directly in fit-out coordination.
UK and Irish commercial and workplace schemes are both designed to BS EN 12464-1. Middle East commercial and workplace schemes are calculated to the same illuminance and task-lighting principles, coordinated with the relevant local authority or building code's requirements. Residential interiors across all three regions are designed to the layout and character brief rather than a workplace standard.
Partner with HLS Consultants for expert lighting design, backed by electrical design and CAD/BIM expertise.
Partner with HLS Consultants for expert lighting design, backed by electrical design and CAD/BIM expertise.
B-128, Ist Floor, Sector 2, Noida, Gautam Buddha Nagar- 201301, Uttar Pradesh
Copyrights© 2026 HLS Consultants (OPC) Pvt. Ltd. (CIN: U71100UW2026OPC256882). All rights reserved.
