Life span of Clear enclosure 23 HD

Hi all,
I just love the previous version (acrylic, clear enclosure) 23" HD display as opposed to the current aluminum version. I recently purchased them used and was wondering how long I can expect these to lasts. I know things like the intensity setting, how long I have it on,etc. affects it but if you can throw in a ball park figure for an average user, that would be great. Thanks.

My 23" ACD has been going since August 2003. But it depends how people use them. Mine is for fairly heavy domestic use, but that would pale beside one used for work 12 - 14 hours a day. I also never run it at maximum brightness as I understand this will shorten the screen's life. I am fairly aggressive with my settings to power down the screen when I'm away also.

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