
I bought 2 packs on 08/23/2019 - I needed 4 bulbs. Use immediately upon arrival. On May 30, 2020, 2 out of 4 lamps are not working. I replaced it with 2 left ones - there was a noticeable difference in brightness between the 'new' and 'used', meaning the other 2 'used' are the same. According to estimates, 15,000 hours corresponds to almost 2 years of continuous operation. The warranty link suggests contacting the manufacturer directly, but it's sold by AmasonBasic so I'm not sure if it can be replaced. So I suggest if you want something reliable - stay away from it.