We get many customers calling asking how long these bulbs are suppose to last. That is really not the question that is important. When you are using TUV light bulbs in air purifiers, the question is how long the manufacturer recommends that you use the light bulb. In this case, Sharper Image recommends that you should only use the bulbs for a period of a year. That means even though the bulb may still be working, you should dispose of it.
Why? Because Sharper Image does their own testing with these bulbs. They mark the acceptable effectiveness for the bulb in combination with their machine. When the purifier starts to not perform to their standards, that is the period of time they recommend changing the bulb and that time period is 1 year.
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