How to Specify Retrofit Lighting in a Tender Document

A practical guide for architects and consultants — with checklists for compliance, sustainability, and performance.

Specifying retrofit lighting correctly in a tender document can make or break a project. Get it right, and you’ll ensure compatibility, compliance, and long-term savings. Get it wrong, and you risk disruption on site, regulatory issues, or failing to meet the client’s sustainability goals.

This guide is for architects, lighting designers, consultants, and estates professionals tasked with specifying retrofit lighting — especially in commercial, healthcare, and public sector environments.

Why Retrofit Lighting Needs Specific Tender Language

Unlike new builds, retrofit lighting projects must:

• Fit into existing infrastructure

• Minimise disruption and cost

• Work with legacy wiring, housings, or ceiling types

• Align with ESG and Net Zero goals

• Meet strict lighting and safety standards

A vague spec like “replace existing with new LED lighting” leaves too much open to interpretation. Instead, build clarity and control into your tender from the start.

What to Include in a Retrofit Lighting Tender Specification

1. Project Intent and Scope

Clearly state this is a retrofit project, and outline goals such as:

• Energy reduction targets

• Compliance upgrades (e.g., emergency lighting)

• Maintaining existing fittings where possible

• Carbon savings or circular economy principles (e.g., remanufactured options)

2. Product Requirements

Specify performance and compatibility in detail:

Include a note that products must be retrofit-compatible (gear trays, luminaire inserts, or direct-fit solutions).

3. Sustainability and Circularity

More public and commercial tenders are now scored against ESG and carbon criteria. Use this to encourage better environmental outcomes.

Checklist for Sustainable Retrofit Spec:

•  Reuse of existing luminaire housing where feasible

• Option to include remanufactured luminaires with supporting data

• Carbon footprint disclosure (embodied & operational)

• UK or local manufacture preferred

• All materials RoHS & REACH compliant

• 90%+ recyclable content target

• Packaging to be minimal and recyclable

4. Controls and Smart Integration

Include compatibility with existing controls, or new smart options if required:

• PIR or microwave occupancy sensors

• Daylight harvesting/dimming capability

• DALI / D4i or wireless control integration

• Commissioning support included in quote

• Include control gear compatibility for retrofits

5. Installation and Disruption Minimisation

For live environments, such as offices, hospitals, or schools:

• Installation must allow re-use of ceiling tiles, voids, and cut-outs

• Work should be phased and low-disruption

• Contractors must provide RAMS documents specific to retrofit works

• Dust and debris mitigation procedures required

• No exposed cabling or voids without prior signoff

6. Evidence and Submissions

Instruct bidders to submit:

• Photometric data (IES or EULUMDAT format)

• TM66 and/or TM65 carbon assessments (where available)

• Case studies of similar retrofit projects

• Sample gear tray or retrofit fitting for inspection

• Breakdown of remanufactured vs new parts (if applicable)

Suggested Specification Clause (Example Wording)

“All luminaires must be retrofit-compatible with existing ceiling infrastructure and designed to reuse current housing or void locations where possible. Preference will be given to remanufactured or circular lighting solutions that deliver equivalent performance with a reduced embodied carbon footprint. Lighting must be CE marked, RoHS compliant, and include a 5-year warranty. Installation must minimise disruption to operations and include full commissioning and controls integration.”

Final Thought: Clearer Specs, Better Outcomes

A well-written retrofit lighting tender reduces ambiguity, supports sustainable procurement, and makes it easier for suppliers to offer compliant, cost-effective, low-carbon solutions.

You don’t need to compromise between performance and sustainability — but you do need to write it into the brief.

Need a retrofit-ready specification template?

Revitalite can provide consultants and architects with example tender wordings, product sheets, and TM66 carbon assessments for remanufactured LED lighting.