Cemar Electro takes great care and uses only the best available components to build our lasers. Your laser should last approximately 20,000 hours under normal conditions. That being said there are conditions that will affect the lifespan such as temperature, a laser constantly in usage above the recommended temperature will have a reduced life. There are also a very small percentage of laser diodes which are defective and in some cases it can take several months for the defect to cause a failure of a laser. You are protected against this possibility with our warranty, if your laser needs to be repaired your warranty will restart from the time the laser is repaired the laser itself will last a lifetime only the diode needs to be replaced on occasion.