Compliance

Lighting Energy Calculations and RoHS: Keep the Evidence Separate

Distinguish building lighting-energy calculations from RoHS product documentation when preparing a lighting tender or import order.

2 min read
·
Sep 7, 2026
·
By Wei Zhang, Lighting Engineer
commercial LED lighting fixtures hanging from ceiling in modern office building

A building-energy calculation and a restricted-substance declaration answer different questions. Keep them separate in the tender so the supplier knows what evidence is required for each.

Identify the energy-assessment method

EN 15193 provides methods for assessing lighting energy use in buildings. Confirm the edition, calculation method, and inputs required by the project. Do not describe it as a universal customs certificate for a smart luminaire.

Document the installed system

modern office ceiling with integrated LED lighting panels and smart control system

An energy assessment needs the installed load, operating schedule, controls, and other relevant assumptions. A component datasheet cannot establish the annual energy use of a whole building.

Check RoHS for the product supplied

RoHS concerns restricted substances in electrical and electronic equipment. Review the applicable scope, substance limits, exemptions, and supporting technical evidence. Do not assume a restriction is newly introduced because it appears in a recent supplier summary.

Match each limit to its source

Ask for the regulation or standard, edition, product category, and test conditions behind a claim. Power quality, energy use, and restricted substances should not be merged into one unexplained pass/fail table.

Track component changes

illuminated commercial building at night with smart lighting control systems

Keep the bill of materials and supplier declarations tied to the model revision. A driver, cable, solder, or enclosure substitution may need a new evidence review.

Prepare two clear documentation sets

Keep the building calculation and commissioning records with the project design. Keep model-specific product declarations, test evidence, and component records with the product technical file.

Frequently Asked Questions

Does RoHS establish a lighting system’s energy efficiency?

No. It addresses restricted substances; energy performance requires different evidence.

Is a component declaration enough for the finished product?

The responsible manufacturer or importer must assess the finished product and retain the evidence required for it.

Official reference: European Commission: RoHS. Check the applicable product, edition, and project requirements when using this guidance.

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Wei Zhang

Lighting Engineer at Tonghua Lighting

Wei Zhang is a senior lighting engineer with over 10 years of experience in LED lighting design and manufacturing. He specializes in photometric analysis, IES-standard compliance, and B2B lighting solutions for commercial and industrial applications.

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