IEC 62031:2018 is also available as IEC 62031:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62031:2018 specifies general and safety requirements for light-emitting diode (LED) modules:
- non-integrated LED modules (LEDni modules) and semi-integrated LED modules (LEDsi modules) for operation under constant voltage, constant current or constant power,
- Integrated LED modules (LEDi modules) for use on DC supplies up to 250 V or AC supplies up to 1 000 V at 50 Hz or 60 Hz.
This second edition cancels and replaces the first edition published in 2008, Amendment 1:2012 and Amendment 2:2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a. the scope was clarified as well as the wording in several other clauses,
b. the normative references were updated,
c. the definitions for "replaceable LED module", "non-replaceable LED module" and "non-user replaceable LED module" were introduced while other definitions covered by IEC 62504 have been removed,
d. the marking clause was restructured and a table added to provide an informative overview,
e. the marking requirements for built-in LED modules were changed,
f. the entry for the marking with the working voltage was revised,
g. the provisions for terminals and heat management were revised,
h. Annex B was deleted,
i. information for luminaire design with regard to working voltage and water contact was introduced,
j. an abnormal temperature test was introduced.