IEC TR 62732-2012 cor1-2012 PDF

Full title and description

IEC TR 62732:2012/COR1:2012 — Corrigendum 1 to IEC TR 62732:2012, "Three‑digit code for designation of colour rendering and correlated colour temperature". The corrigendum updates/corrects the original Technical Report, which defines a compact three‑digit shorthand combining nominal general colour rendering index (CRI) and nominal correlated colour temperature (CCT) for use in lamp/product identification and datasheets.

Abstract

This Technical Report specifies how to construct a three‑digit code that represents, in a compact form, the nominal general colour rendering index (CRI) together with the nominal correlated colour temperature (CCT) of a light source. The December 2012 corrigendum (COR1:2012) provides editorial corrections and is included with current copies of the report.

General information

• Status: Current (stable — stability date 2030 as listed by IEC).
• Publication date: IEC TR 62732:2012 — 10 January 2012; Corrigendum 1 — 4 December 2012.
• Publisher: International Electrotechnical Commission (IEC), TC 34 / SC 34A (Electric light sources).
• ICS / categories: 29.140.01 (Lamps in general).
• Edition / version: Edition 1.0 (base TR); Corrigendum 1 applied to that edition.
• Number of pages: Base Technical Report — 6 pages (typical IEC edition); Corrigendum — published as a corrigendum (no substantive additional pages listed).

Scope

The report describes the construction of a three‑digit code intended as a shorthand notation that combines the nominal general colour rendering index (CRI) and the nominal correlated colour temperature (CCT) of a light source. Its purpose is to provide a concise, industry‑recognised designation for colour properties used in product labelling, catalogs and technical communications. The corrigendum corrects editorial items in the original report.

Key topics and requirements

• Definition and construction rules for the three‑digit "light colour" code that links CRI and CCT into a compact designation.
• Relationship of the code to existing lamp‑coding systems and product identification practices (used alongside systems such as ILCOS / IEC 61231).
• Clarification of which colour metric(s) the code represents (nominal general CRI and nominal CCT) and expected use in datasheets and trade catalogues.
• Editorial corrections introduced by Corrigendum 1 (small fixes to wording/format; corrigendum does not change the fundamental intent of the code).
• Cross‑references and applicability to related lighting standards and product specifications.

Typical use and users

Primary users include lamp and luminaires manufacturers, product catalogue authors, lighting designers, test laboratories, standards committees and regulatory bodies. The code is intended for use in product labelling and documentation where a short, standardised indication of colour rendering and approximate colour temperature is useful for specification and comparison.

Related standards

Key related documents include IEC 61231 (International lamp coding system — ILCOS), IEC TR 60887 (glass bulb and related designation systems), and other lighting standards that reference or adopt the light‑colour designation; modern lighting and LED documents (for example IEC 62504) also reference the "light colour" designation defined in IEC TR 62732.

Keywords

three‑digit code, light colour designation, CRI, colour rendering index, CCT, correlated colour temperature, lamp coding, ILCOS, IEC TR 62732, corrigendum

FAQ

Q: What is this standard?

A: IEC TR 62732:2012 is a Technical Report that defines a three‑digit shorthand code for indicating the nominal general colour rendering index and the nominal correlated colour temperature of a light source; COR1:2012 is the corrigendum (editorial corrections) published in December 2012.

Q: What does it cover?

A: It covers the rules for constructing the three‑digit "light colour" code (how CRI and CCT information are combined into the code), intended uses in labelling and product documentation, and examples/notes on application; the corrigendum corrects editorial items without changing the basic coding approach.

Q: Who typically uses it?

A: Lamp and luminaire manufacturers, product cataloguers, lighting designers, test laboratories, standards writers and procurement/specification professionals use this TR to produce compact, consistent colour designations in product literature.

Q: Is it current or superseded?

A: As published by IEC the report (with Corrigendum 1 applied) is the current referenced Technical Report; the IEC webstore lists a stability date (2030) for the publication. Users should check national/adopted versions or later IEC activity for any subsequent updates.

Q: Is it part of a series?

A: It is a stand‑alone Technical Report within the TC 34/SC 34A portfolio and is used alongside lamp coding systems such as IEC 61231 (ILCOS) and other IEC lighting standards that reference the light colour designation.

Q: What are the key keywords?

A: Three‑digit code, light colour designation, CRI, CCT, colour rendering, lamp coding, ILCOS, IEC TR 62732.