Hi Gary. Good questions. There are some distributors of projector lamps that sell aftermarket or third party bulbs for projectors. These are the equivalent to a "knock-off" and many times are poorly made, have a very high early failure rate and can sometimes damage your projector. We only carry OEM bulbs for our Projector Lamps. These are the original bulbs from top brands like Philips, Osram and Ushio. Please let us know if we can help to answer any other questions by calling Customer Service at 888-455-2800.
Answered on 6/13/2013 by Anonymous