There can be a lot of variation. From what I've seen, I'd say 2-5 years is a typical lifespan for an LED bulb. We have some recessed lights in the kitchen that require brighter bulbs, and those typically last only 1-2 years. But then we also have some other (non-replaceable!) recessed lights that are 14 years old and still work fine.
replyThere was one time I bought some cheap ones from Amazon, and several of them failed within a few months. There was also an LED bulb in the front porch light (so, outside) that lasted around 10 years, despite being outside and used daily. I had several of that same type and that particular one lasted longer than all of the others, where the others were all inside and not installed upside down. So yeah, it varies.
My Philips Hue bulbs are going strong for just over 7 years now. They are the premium bulb in my experience. I've bought other LED strips using controllers compatible with Hue, but they died where there are obvious burned points all along the strip. We all have different experiences that will counter each other, so it's frustrating to no end on finding trust worthy devices.
replyRegardless of all of that frustration, thank the gods we no longer have to deal with CFL