Buy in bulk at the cheapest prices on the internet 4 to 24 tubes for pound205 each 25 to 49 tubes for pound169 each 50 to 99 tubes for pound155 each 100 tubes for pound135 each a 36 watt 4ft t8 tld fluorescent triphosphor tube daylight this t8 fluorescent tubelamp has an average life of 15 000 hours and has an a class energy efficiency rating boxed in 25s