The average rated lifetime is the industry standard when it comes to estimating the number of hours a bulb is predicted to last.
10,000 hours is the average rated lifetime of Verilux bulbs based on testing. Some bulbs will last longer than the average and some will cease functioning earlier than the average hours. External factors impacting bulb life include environmental temperature, excessive cycling on and off, humidity, vibrations, and any other condition that differs from the controlled lab environment in which the testing is conducted.
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