It depends a lot on the bulbs. When we moved into our current house 11 years ago, we replaced everything with LEDs. Many of those original bulbs are still going strong, including all of the 20 or so integrated pot lights we put in to replace the old-school halogen ones. Others died within a year, and replacements have been similarly hit and miss. To some extent you get what you pay for; most of the random-Chinese-brand LEDs I've picked up off of Amazon have failed pretty quickly. Most of the Philips and similarly expensive ones have lasted. Also the incandescent-looking ones that stuff all the electronics into the base of the bulb tend to fail quickly, as do anything installed in an enclosed overhead light fixture, due to heat buildup.