Special offer buy between 4 24 for pound230 buy between 25 49 for pound215 buy between 50 and 99 for pound205 buy 100 for pound195 an 30 watt 3ft t8 tld fluorescent triphosphor tube this t8 fluorescent tubelamp has an average life of 15 000 hours and has an a class energy efficiency rating t8 fluorescent tubes are available in colours extra warm white 827 warm white 830 standard white 835 cool white 840 boxed in 25s general characteristics wattage