Posted by Steven Schoonover on 10/5/2016 5:00:00 AM
It is recommended that you turn off your classroom projector if you are not going to be using it for 30 minutes or more. Those lamps typically have to be replaced after about 400-450 hours of use.
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Ellicott School District 22
322 South Ellicott Highway
Calhan, CO 80808