You may have heard that LED light strips can last up to 50,000 hours, and that’s technically true. The main issue is that LEDs slowly lose brightness over time. After running for 50,000 hours, LEDs are typically about 70 percent as bright as they were originally. In practice, LED light strips usually don’t last quite that long. The adhesive may fail and need patching, and the power supply may fail before the actual LEDs. Most LED light strips offer a one- or two-year warranty.