Because different lasers produce different output powers and use different power sources, not to mention the difference in the quality of the green diode, the life expectancy of some laser pointers may vary greatly. A typical cheap laser pointer burns out after less than 100-500 hours of use, while a high-quality laser pointer has a standard life span of 5000+ hours and usually has a standard warranty period of 3-6 months. Obviously, the difference between the quality of laser pointers and the companies that provide them requires anyone considering buying a green laser pointer to do some research on what they really want to get.
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