SYLVANIA T5 fluorescent bulb, G5 socket, 14 watt/1350 lumens, cool white (4000 K), 20000h life, linear shape, 16 mm diameter, 550 mm length, white bulb, dimmable, pack of 10 : Amazon.co.uk: Lighting
Sylvania 4' 36W C827 Very Warm White
14W 550mm Fluorescent Tube 830 Warm White 3000K 1200lm
21W 849mm T5 Fluorescent Tube 1900lm 840 Cool White 4000K
5 Foot T5 Fluorescent Tube 49W G5 4000K Cool White - John Cribb & Sons Ltd, UK Electrical Distributors, Dorset, Hampshire, Wiltshire, Somerset & the Isle of Wight.