ISO CIE TS 22012-2019 PDF

Full title and description

ISO/CIE TS 22012:2019 — Light and lighting — Maintenance factor determination — Way of working. This technical specification provides a standardized procedure for determining the maintenance factor (MF) for indoor and outdoor lighting installations, harmonizing the methodology described in the relevant CIE documents and supporting consistent MF estimation for design and life‑cycle evaluations.

Abstract

This document specifies a standardized way of working for determining the maintenance factor for both outdoor and indoor lighting installations using the methodology described in CIE 154:2003 and CIE 097:2005. It gives procedural guidance on condition assessment, selection of cleaning and lamp‑lumen depreciation factors, sampling and measurement, and documentation to support reproducible MF determination.

General information

• Status: Published (current technical specification).
• Publication date: February 2019 (ISO edition 1, published 2019‑02—implementation dates vary by national body).
• Publisher: International Organization for Standardization (ISO) in cooperation with the International Commission on Illumination (CIE).
• ICS / categories: 91.160.01 — Lighting in general.
• Edition / version: Edition 1 (2019).
• Number of pages: 28 pages (official ISO publication PDF 28 pp.).

Key bibliographic and status details as published by ISO and national standards bodies.

Scope

ISO/CIE TS 22012:2019 defines a consistent way of working for estimating the maintenance factor used in lighting design and assessment for both indoor and outdoor installations. It does not replace the underlying calculation methods in CIE 154:2003 (outdoor) and CIE 097:2005 (indoor) but establishes practical steps for condition surveys, selection of cleaning and lamp‑lumen depreciation assumptions, sampling strategies, measurement procedures, and recordkeeping so that MF values are reproducible and fit for purpose.

Key topics and requirements

• Standardized workflow for MF determination: condition assessment, selection of cleaning schedules and maintenance regimes.
• Guidance on lamp‑lumen depreciation (LLD) and luminous flux maintenance assumptions.
• Cleaning factor (CF) considerations and procedures for assessing dirt accumulation and cleaning intervals.
• Sampling and measurement procedures to collect representative photometric/illuminance data.
• Documentation, reporting and traceability of MF determinations for design and verification.
• References and alignment with CIE 154:2003 and CIE 097:2005 (normative background) and related product/fixture standards where relevant.

Typical use and users

Practitioners in lighting design, transport and street‑lighting authorities, facility managers, lighting engineers, consultants performing lighting maintenance planning or life‑cycle lighting assessments, and standards committees use this TS to ensure consistent MF estimates across projects and jurisdictions. It is used where designers or asset managers need a defensible, repeatable MF for illuminance calculations, maintenance planning and energy/performance assessments.

Related standards

Normative and related references include CIE 154:2003 (Maintenance of outdoor lighting systems), CIE 097:2005 (Maintenance of indoor electric lighting systems), and other applicable lighting and luminaire performance standards (for example IEC 62722 series for luminaire performance). ISO/CIE TS 22012:2019 is intended to be used alongside these documents to apply MF in practical projects.

Keywords

maintenance factor, MF, maintenance factor determination, cleaning factor, lamp‑lumen depreciation, lighting maintenance, indoor lighting, outdoor lighting, CIE 154, CIE 097, luminaire performance, lighting design.

FAQ

Q: What is this standard?

A: ISO/CIE TS 22012:2019 is a technical specification titled "Light and lighting — Maintenance factor determination — Way of working" that prescribes a standardized procedure for determining maintenance factors for lighting installations.

Q: What does it cover?

A: It covers the practical workflow for MF estimation: condition surveys, selection of cleaning and lamp‑lumen depreciation parameters, sampling and measurement methods, and documentation practices to produce reproducible maintenance‑factor values for indoor and outdoor lighting systems.

Q: Who typically uses it?

A: Lighting designers, engineers, facility and asset managers, municipal lighting authorities, consultants and anyone responsible for lighting maintenance planning and design verification.

Q: Is it current or superseded?

A: As published in February 2019 (Edition 1) the technical specification is current; ISO records indicate the publication was reviewed and confirmed in subsequent review cycles and remains the valid version (no superseding edition published as of the last ISO confirmation).

Q: Is it part of a series?

A: It is an ISO/CIE joint technical specification complementing the CIE maintenance guidance documents (CIE 154 and CIE 097) and fits within the ISO/TC 274 family of light and lighting publications; it is not a multi‑part ISO series by itself but links to several related lighting standards and technical reports.

Q: What are the key keywords?

A: Maintenance factor (MF), cleaning factor (CF), lamp‑lumen depreciation (LLD), lighting maintenance, indoor/outdoor lighting, sampling, measurement, CIE 154, CIE 097.