Home Lighting
Osram FC Fluorescent Circular Lamp 2GX13 830 55 W Warm White
Energy efficiency class (EEI index): A Energy consumption: 60.5 kWh/1,000 h Colour rendering index: 80-89 Ra Size: diameter: 1.6 cm, tube diameter: 1.6 cm (with base but without pedestal pin), length: 30 cm
https://www.bizrate.co.uk/homelighting/osram-fc-fluorescent-circular-lamp-oid36765952305.html