This DLP projector uses an LED bulb as its light source, and it's rated to last anywhere from 20,000 to 30,000 hours by the manufacturer, so you likely won't ever have to worry about replacing it. It has a 1.3x optical zoom, allowing you to adjust the projection distance without moving the projector. It's not a true 4k projector, as it uses pixel shifting to create a higher-resolution image. This offers better quality than a pure 1080p projector but isn't as good as a native 4k projector. The manufacturer claims that the projector downscales 4k @ 120Hz signals to 1080p @ 120Hz, but it doesn't accept 4k @ 120Hz signals at the moment. 4k @ 60Hz, 1080p @ 120Hz and 1080p @ 240Hz signals work fine.
BenQ HT4550i Review
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