NOT KNOWN DETAILS ABOUT HOW TO TELL IF PROJECTOR BULB IS DYING

Do me the favor to monitor distinction and black level though calibrating, you got the equipment to do so if you do it proper.So if fifty% loss at 20k hours, twenty five% loss at 10K hrs. Have you ever communicated with manufacturer engineers concerning this and will it differ by manufacture or simply design? Many thanks.Relating to brightness: Lum