Light output. The Pro G6900WU is rated at 6,000 ANSI lumens, and using its internal white test pattern did give a maximum reading of 6021 lumens on our projector using Dynamic mode. Switching to an external source over HDMI, Dynamic mode measured 5012 lumens with 85% brightness uniformity. On most projectors, Dynamic mode is a green-tinged mess designed to pump white light output at the expense of color and contrast, but Dynamic mode on the Pro G6900WU actually produces a respectable picture that would be appropriate for text and data graphics in a high ambient light setting.
The next mode, Presentation, has a cooler bluish tone and better black levels than Dynamic. At 3922 lumens, Presentation mode does give up some of Dynamic's brightness, but the trade-off is worth it for color-rich PowerPoint presentations, graphs, or charts.
Theatre mode, at 4049 lumens, has better color saturation and accuracy and a very good default gamma calibration. Theatre mode is more likely to be used with the lamp at low power and with the auto iris engaged, in which case light output drops to 2632 lumens. That's a more appropriate level of brightness for a room with dimmed lights and a more comfortable configuration for the viewing of film or video.
Sports mode, at 4285 lumens, has the same blue tint bias as Presentation and is appropriate for live television and video content, just as the name implies.
The final image mode is sRGB, which at 3268 lumens has both the most natural color of any preset mode on the projector and the lowest light output. If you plan to view a lot of photography and can afford to sacrifice the light output, sRGB mode is the way to go.
Any image mode can be reduced in brightness by switching to ECO lamp mode. ECO mode reduces lamp power by 36% and can bring the Pro G6900WU to a more appropriate level of brightness for smaller screens or rooms with better control over ambient light.
Contrast. In a room with ambient light, the Pro G6900WU produces a well-balanced image with sufficient contrast for viewing text and data graphics, though contrast is not the projector's strongest suit. Content like video, film, and photography is much improved if room lighting can be dimmed. The projector's automatic iris is useful for deepening black level when room conditions allow. There is little muddiness in shadows, and black is black, not dark gray, when the lights are off.
Color. Even in its brightest modes, the Pro G6900WU's color performance is more than adequate for data graphics. Color light output matches white light output, meaning that color appears natural and color-rich images do not seem dark or undersaturated. This all comes together to give the Pro G6900WU a bright, vibrant image that is not just limited to black-and-white data, but is a good choice for video, film, and photography use in a non-theater setting.
Sharpness and Clarity. The Pro G6900WU's image is sharp and clear at just about any resolution. The Pro G6900WU is capable of natively displaying both WUXGA and HD 1080p. These native-res signals are tack-sharp on the Pro G6900WU, which does an excellent job of rendering fine detail from both video sources and data.
Lower-resolution signals can either be displayed natively in a window or scaled to fit, but the projector upscales cleanly and shows few signs of blurring or detail loss. Up-conversion of a text document from a WXGA (1280x800) laptop did not result in any significant loss of legibility.
In our testing, there was significant digital noise in Dynamic mode, especially when watching film or video. The noise was much less noticeable in still content like photographs, PowerPoint presentations, and web pages. The other image modes were less noisy than Dynamic, with sRGB being the cleanest mode available.
Input Lag. Straight out of the box, the Pro G6900WU measured 92.3 milliseconds of input lag, or five and a half frames on a 60 FPS signal. Film and video playback might have visible audio delay if a correction circuit is not used. Like other Epson projectors, the Pro G6900WU includes an option to use either "Fast" or "Fine" image processing. Fast processing reduces input lag to 40 milliseconds, or just over two frames, but also reduces detail clarity in the image.