This LED T5 tube has been manufactured by Osram in order to replace 27W fluorescent T5 tubes. It produces a cool white 4000K output and is suitable for both domestic and commercial lighting it also has an incredibly long average life span of approximately 60000 hours. This lamp comes with a 5 year guarantee from the date of dispatch and is easy to retrofit into old fittings. Simply remove the old tube and install this tube be sure to check that the existing control gear is high frequency as this lamp requires it to operate.