Is there a time limit for how long you can have a mp 2100 projector run?  One of my users indicated that they had been told they were not to run the mp 2100 projector all day, because it would harm the bulb.  I was not able to find this same information in any of the FAQs, user guide, etc.  I had never heard of a specific time limit on how long you could have a projector run, but if there is one, please let me know.  Thanks.