Comments collected by GRB in response to the proposals to prevent misuse of replacement lamps (GRE/2017/17, GRE/2017/22, GRE-78-28) during the 78th GRE session.

Revised proposal to introduce requirements for light emitting diode (LED) substitute light sources into Regulations Nos. 48, 53, 74 and 86.

Review prepared by the Task force on Substitute and Retrofit Light Sources chair.