standard fluorescent tube with diameter 26 mm, G13 Cool White (4000K). Technology: Hot cathode fluorescent (requires ballast/ballast)., Light Shade: 840 (LUMILUX Cool White)., Luminous Flux: 1350 lumens., Efficiency: High lumen maintenance throughout the service life., Dimensions: Length 590 mm (compatible with 60 cm ceiling lights)., Energy Class: G (according to current EU labelling).