When you turn the projector’s low lamp brightness feature on, (that’s their name for Eco mode on this projector series) the lumens in bright mode drops to 1929, a 30% reduction from its high lumens output of 2752.
For the rest of the measurements with full lamp power, the IN2128HDx saw some steep drop offs in all modes save for blackboard. This is important because as we learned back in the color mode quality page, bright mode, while brightest, suffers greatly in the color department. So that said, in presentation mode, the projector’s brightness dropped to 751 lumens, a 73% brightness reduction from the peak measurement of 2752 lumens!
Typically, I expect presentation to be brighter, but it looks like InFocus attempted to get cinema mode quality color in presentation mode and brought it down to a similar brightness. You can adjust the brightness while in presentation mode if you want to tinker a bit for your own purposes. If you want to save any color settings however on a preset, you’ll have to utilize user mode, as adjusting the other color modes does not save such settings when you move off that mode at all. On a relative note, User mode starts out on a level fairly close to presentation mode, putting out 726 lumens.
Back to the rest of the modes, cinema mode actually came in higher than presentation, at 802 lumens. You could see some cinema modes have such a stark 70% reduction from bright to cinema as is the case here, but I still would have liked to have seen a bit higher lumens output for cinema and presentation modes.
Lastly, there is a whiteboard mode, a blackboard mode, and even a beige wall mode, though I skipped the beige as we really don’t see a need for that much these days. Whiteboard came in measured at 576 lumens, while blackboard was able to put out 2304 lumens.