Symbol 5974 from IEC 60417 - Title/Meaning: Devices for connection of fixed luminaires; DCL 
Function/description: To indicate an outlet or a plug that is only to be used with fixed luminaires.
Own work using: iso.org/obp/graphics/grs/d8e1dd5b-5481-4298-b9b6-ca738ad12c16 200.png
Vectorization:  Mrmw