Buy in bulk at the cheapest prices on the internet 4 to 29 tubes for pound224 each 30 to 59 tubes for pound183 each 60 to 89 tubes for pound178 each 90 tubes for pound173 each a 39 watt 849mm high output t5 triphosphor tube ho this t5 tubelamp has an average life of 30 000 hours and has an a class energy efficiency rating t5 ho tubes are available in colours extra warm white 827 warm white 830 standard white 835 cool white 840 daylight 865