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Strengths: Lamps have lasted quite awhile for me. I read the manuel and it clearly states that you have to clean the filters every 200 hours. Also the lamp life depends on what inviroment you are in.
Weaknesses: Lamps tend to go out faster in a smoking inviroment or in one where grease or lots of dust and even cat hairs exist.
Summary: You also need to understand that the 3000 hours is a guideline. of the 1000 lamps tested 50% or more reached 3000 hours. ive seen some last 4500 hours. ive seen some last 900 hours. but usually i pull the lamp out and its coated with dust. Look at them the same way you would a light in your house. sometimes that light bulb can last 3 -10 years and sometimes 4 months..
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