3 pin round plug can be commonly applied to plug in light fittings. 
This 5Amp round pin plug is manufactured to BS546 and are made of flame retardent ABS, which is an unfused mains plug that can be served as long term use. 
Package contains one black 5Amp plug providing reliable quality, for your use and replacement of old, can be used for a 5Amp circuit to enable main switch control for all lights in room.