Depending upon how you use the moon lamp, it can last multiple years. A moon lamp basically contains 3 major parts: the exterior bulb, the LEDs and the battery. The LEDs and the battery are easily replaceable so it is not much of an issue. Although, the exterior bulb needs proper care and attention while you are using the lamp. If the bulb breaks, you will have to get a new one entirely. Even if you manage to piece it together, it simply won’t be as good as new and will be more fragile than before.