Buy in bulk and save buy between 4 24 for pound130 buy between 25 49 for pound110 buy between 50 and 99 for pound105 buy 100 for pound099 an 18 watt 2ft 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 w