Electric Heating; Electric Light Sources Not Otherwise Provided For; Circuit Arrangements For Electric Light Sources, In General
F21V
Functional Features Or Details Of Lighting Devices Or Systems Thereof; Structural Combinations Of Lighting Devices With Other Articles, Not Otherwise Provided For
F21Y
Indexing Scheme Associated With Subclasses F21k, F21l, F21s And F21v, Relating To The Form Or The Kind Of The Light Sources Or Of The Colour Of The Light Emitted
Y02B
Climate Change Mitigation Technologies Related To Buildings, E.g. Housing, House Appliances Or Related End-user Applications
F21S
Non-portable Lighting Devices; Systems Thereof; Vehicle Lighting Devices Specially Adapted For Vehicle Exteriors
