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The projector was great for the first 250 hours then the bulb began flickering. (FYI I am at 5500ft and I am using the obnoxiously loud High Altitude mode. Vivitek support states that you will void your warranty and can except extremely short bulb life if you live above 5000ft and do not use this mode. It is unfortunate because it is whisper quiet on normal mode and sounds like a vacuum hanging from my ceiling in high altitude mode.)

I switched the bulb to High mode and this eliminated the flickering so I continued using the projector. Now at about 520 hours the flickering is back in High mode and if I switch to Low mode its like a strobe light.

I will be contacting their support again tonight but it seems like flickering/bulb issues may be a problem with this device.