Puck lights are used commonly indoors but also outdoors for low profile, soft lighting. These small round or oval-shaped lights adhere to surfaces, counters, or hard-to-light corners. LED puck lights are going to provide better lighting and performance than halogen lights, and can last anywhere from 18,000 hours to 50,000 hours. With the use of just a few hours a day, a light could feasibly last two decades. But this depends on use, materials, upkeep, and where it’s being used. That said, LED puck lights are a fairly durable lighting option.