You need to replace this every 500 Hours, however the quality of the light output after 500 hours decreases severely. In endoscopic surgery light is one of the most critical components. I've been to several accounts where they had no replaced the bulb assembly where the surgeons were complaining about dark images and poor image quality. These complaints went away as soon as the bulbs were replaced.
Last edited by NickM; 17/03/16 10:32 AM. Reason: spelling