How to compare two technical bids for warehouse and logistics hub lighting

Overview

Two bids with the same luminaire count and installed power can describe profoundly different installations. In logistics hubs lighting runs almost continuously and must follow narrow aisles, high racking and moving vehicles. This methodological comparison by Centro Studi Lumeitalia explains how to read two warehouse and logistics hub lighting proposals in parallel without stopping at price.

Applicable standards

The regulatory reference for warehouse and logistics hub lighting is not a single document but a coordinated set of standards covering performance, safety and environmental impact. In design practice the following documents drive the main choices.

• EN 12464-1 — requirements for storage and picking areas.
• Italian Legislative Decree 81/2008 — safety in materials handling.
• EN 1838 — emergency lighting.

Bringing bids onto a common basis

The first step is checking that both proposals assume the same requirements, the same geometry and the same maintenance factor. If one calculates for a new installation and the other at end of life, comparison is impossible until the assumptions are realigned. The same check applies to annual operating hours and the planned dimming profile.

In warehouse and logistics hub lighting projects, differences frequently arise from a different reading of site conditions: clarifying this point in writing is worth more than any comparison table.

Where the differences hide

• Photometry — File of the proposed luminaire, not an equivalent — Calculation not reproducible
• Maintenance factor — Value and associated cleaning cycle — Below-target performance at end of life
• Control — Protocol, dimming curve, signal-loss behaviour — Declared savings not achieved
• Protection — Coordination and declared withstand — Premature failures outside warranty
• Maintenance — Cycles, access, spares and lead times — Operating cost above budget
• Warranty — Duration, exclusions, validity conditions — Unplanned burden on the client

From price to cost of ownership

A meaningful economic comparison spans the whole operating period: initial investment, annual consumption under the planned dimming conditions, cost of planned maintenance and an estimate of replacements. Energy price and inflation assumptions must be declared: changing them changes the outcome, and undeclared they make the comparison non-reproducible.

The selection criterion must be written before bids are received. Setting parameter weights afterwards is the practice that generates the most disputes in comparative procedures.

Recurring critical points

The difficulties that most often emerge in warehouse and logistics hub lighting projects are not about product selection, but about defining requirements and verifying results.

• Lighting the rack face, not only the aisle floor.
• Avoiding glare for forklift operators.
• Matching levels between automated and manned areas.

Design approach

An orderly method drastically reduces variations during works and disputes at commissioning. Three choices make the difference from the earliest stages.

• Narrow-distribution optics aligned with the aisle axis.
• Per-aisle control with dedicated sensors and standby levels.
• Different requirements for picking, storage and loading docks.

Parameters to verify

• Vertical illuminance — EN 12464-1 — label legibility on the rack face
• Aisle uniformity — EN 12464-1 — continuity along the axis
• UGR — EN 12464-1 — workstations and driving cabs
• Emergency — EN 1838 — aisles and exits

Most frequent mistakes

Non-conformities found at commissioning almost always come from three causes: requirements not declared or declared without a reference standard, calculation run on idealised geometry, and an optimistic maintenance factor. All three can be avoided at zero cost during design.

• Same assumptions on requirements, geometry and operating hours
• Maintenance factor aligned across proposals
• Photometric files of the luminaires actually offered
• Maintenance and spare-part items quantified
• Economic assumptions (energy, inflation) declared
• Selection criterion defined before bids are opened

Key takeaways

A warehouse and logistics hub lighting project holds up over time when requirements are declared, the calculation reproduces real conditions and on-site verification follows an agreed protocol. Component selection matters, but comes later: without measurable requirements even the best product delivers a result that cannot be demonstrated. Centro Studi Lumeitalia makes its technical office available to review requirements and design checks.

Methodological note: This content is written for technical information purposes by Centro Studi Lumeitalia and does not replace the lighting design or a full reading of the standards cited. Applicable performance values are those of the standards in force at design time.

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