Luminaire manufacturing after LED: drivers, photometry and relentless price erosion

The bought-in bill of materials and the parts that remain yours

A modern fitting is largely purchased content: light engine, driver, connectors and often the housing extrusion. What remains proprietary is how heat leaves the junction, how the optic distributes light, how the fitting mounts and maintains, and how quietly the driver behaves with a dimming system. Those are real engineering problems with commercial consequences, since thermal shortcuts show up as colour shift and premature failure long after the sale. Manufacturers who understand this specify components conservatively; those who do not compete on price until a warranty wave arrives. Selecting a driver on price alone is the most common route to a range with an embarrassing failure rate.

Photometric files, electrical compliance and the test house queue

Specifiers design in software fed by photometric data files, so a fitting without credible measured data is effectively invisible to the professional market. Producing those files requires a goniophotometer or paid laboratory time for every variant, and variants multiply with optic, output and colour temperature options. Electromagnetic compatibility and electrical safety testing sit alongside, governed by international electrotechnical standards. The cumulative testing bill limits how wide a range a small manufacturer can honestly publish, and range breadth is exactly what large competitors use to win specification. Product managers who survive restrict variant counts to what the testing budget can genuinely carry.

Ecodesign and labelling rules that retire a catalogue

European ecodesign and energy labelling measures set minimum performance for lighting products and remove non-compliant items from the market on a published timetable. Compliance is not just a test: it brings product information obligations, spare parts and repairability considerations, and a registration burden that must be maintained. Each tightening removes older designs and forces requalification of the survivors. For a manufacturer this is predictable but expensive, and the discipline it demands is inventory management, because stock of a soon-to-be-restricted item is worth less than the storage it occupies. Channel stock has to be run down in step, since obsolete inventory generally finds its way back to the manufacturer.

Three routes to market that behave nothing alike

Specification selling means persuading a designer or consultant to name your product in a project, then defending against substitution by the contractor at buying stage. Wholesale trading means holding stock, competing on availability and accepting thin margin on standard items. Public and infrastructure tenders, particularly street lighting, involve formal procurement, long evaluation and demanding warranty terms measured in years of unattended operation. Most manufacturers pursue all three and staff them separately, because the skills, cash cycles and product configurations required are genuinely different. Serving all three from one price list and one stock policy is how mid-sized manufacturers lose money in a growing market.

Why margins fall faster than the cost base

Each generation of light engine delivers more output per unit cost, and customers know it. Prices reset downward while the manufacturer still holds inventory built at older costs and a catalogue photographed at older specifications. Long project cycles compound the problem: a fitting quoted for a building may be delivered when its price has already moved. The defences are narrow ranges refreshed deliberately, control of stock depth, service and controls capability that resists commoditisation, and a willingness to retire products before the market retires them for you. Holding a wide catalogue through a price transition reliably converts a profitable year into a written-down one.

Frequently asked questions

Why do specifiers insist on photometric files rather than a data sheet?

Because lighting design is done in calculation software that needs measured distribution data to model a space. A summary figure for output tells a designer nothing about glare, uniformity or how the fitting performs at a given mounting height. Without a usable file the product cannot be modelled, so it never enters the design. Manufacturers who publish files for every variant, measured properly, get considered; those who publish one file for a whole family invite challenge.

How do manufacturers stop contractors substituting cheaper fittings after specification?

Partly by writing specifications that name performance characteristics only their product credibly meets, and partly by staying present through the procurement stage rather than declaring victory at design. Providing the contractor with a competitive package, supporting the substitution review with comparative data, and offering commissioning or controls support all help. The blunt reality is that substitution is normal, so manufacturers who invest in specification also invest in defending it during buying.

Is it worth manufacturing your own light engines?

Rarely for a mid-sized luminaire maker. Board assembly and component sourcing are competitive and fast-moving, and the performance step between generations comes from semiconductor suppliers rather than from the board maker. The stronger position is deep competence in thermal, optical and control integration, combined with the ability to switch engine suppliers as generations change. Vertical integration here tends to lock a manufacturer into last year's efficacy.