How long do the full spectrum bulbs and replacement tubes last?

I want to know about life span of full spectrum bulbs and replacement tubes?How long do the full spectrum bulbs and replacement tubes last?Eco-friendly and energy efficient OttLite bulbs are rated to last up to 10,000 hours -- more than 10x longer than a standard light bulb that typically lasts 750 hours.How long do the full spectrum bulbs and replacement tubes last?I got one of those lamps at Goodwill and even used the bulb lasted for a long time then burnd out THEN I replaced it and the new one has lasted a year and a half so far. Hope that helped