Customers can expect 300-400 hours of lamp life. As lamps age, your machine will gradually increase treatment times to compensate for decreasing intensity. Also look for the ends of the lamps to take on a grayish smudge that grows larger and darker with age. This is a good sign you're not getting the best intensity out of your machine.
Contact Us if you are ready to replace lamps, or want to learn more about converting your machine to Narrowband UVB.