The most obvious key features of the XJ-UT310WN are its ultra short throw range and its estimated 20,000 hour light source. In addition to these benefits the unit offers the following:
Eco friendly. The list of eco-friendly features in the XJ-UT310WN starts with the 20,000 hour light engine, which should eliminate the need (and cost) for replacement lamps, along with the carbon costs for shipping them. It is also mercury free.
In addition, the projector offers seven brightness settings, with two non-Eco and five Eco modes, so you can closely match its brightness to the ambient light and screen size. The setting can make a significant difference in power use. I measured the two non-Eco modes at 205 and 185 watts and the Eco modes at 148 to a notably low 83 watts. You can also set the projector to turn off after not receiving a signal for 5 to 30 minutes.
Excellent warranty. The XJ-UT310WN's warranty varies depending on the type of customer (business, government, or education) and level of use, but if you use it for up to ten hours per day five days per week, even the minimum warranty is three years for the unit and three years or 6000 hours for the light source.
Excellent sound system. The 16-watt mono speaker delivers better than typical sound quality and enough volume for a mid- to large-size room.
Bright image with wide brightness range. With one predefined mode for its two non-Eco settings and five for each of the five Eco levels, the XJ-UT310WN gives you 27 combinations of settings that can affect brightness. That translates to both a large range of brightness and more levels within the range than most projectors offer.
I measured the non-Eco settings at 3294 lumens and 2775 lumens, and the five Eco settings with their brightest predefined modes at 1235 to 2342 lumens. You can drop the brightness further by combining the lower brightness Eco settings with lower brightness predefined modes. With the brightest Eco setting, the least bright predefined mode was only 57% as bright as the brightest mode.
As with most DLP projectors, color brightness for the brighter settings came in lower on my tests than white brightness, which explains why blue is a little dark in those modes. The good news is that even with the brightest settings, which usually show the most difference, the color brightness was roughly 70% of the white brightness. That means you won't see as big a brightness difference between full color subject matter and images that are predominantly white as you would with many other DLP projectors.
In any case, the brighter settings were easily bright enough to let the 92" diagonal image in my tests stand up to the ambient light in a typical classroom or conference room, and the range of settings offers flexibility for lower light levels and smaller screen sizes.
Acceptable brightness uniformity. The 72% brightness uniformity for the XJ-UT310WN isn't unusually low for an ultra short throw projector, but it's enough for the variation in brightness to be visible on a solid color screen. If you break the image up with text or graphics, however, it's hard to see the difference. For most applications, it shouldn't be an issue.