Effect of different settings on lumen output
The XV-Z17000 has two iris modes, manual, and dynamic. Both may operate at the same time. Iris 1 is the manual which has two settings: High Brightness, and High Contrast. The other iris, the dynamic one also has two modes: Off and On.
Iris on High Brightness = 24% increase in output over iris on High Contrast
Bright Boost turned off = 22% drop in output from either Eco, or Eco off modes
Eco On is about 26% brighter than Eco off.
Note that the Sharp has four brightness modes. Starting with the least bright, there's Eco mode. Next comes Eco mode with Bright Boost On, then Eco Off with Bright Boost Off, and finally, the Brightest mode: Eco Off, Bright Boost On.
That also translates to a very bright projector, even in Movie Mode, and even with the iris on high contrast, this projector produces well over 600 lumens.
The Z17000, as you can see above, approaches 1100 lumens in Movie Mode, if you pull out all the stops. You'll only pick up a bit less than 15% more lumens with Dynamic mode.