Projector Central just did a review of W1080ST and a description of the Smart Eco mode is unusually different from anything else I have read about it:
"SmartEco mode can reduce light output even more drastically than Eco mode, but there's a catch. In order to really bring down light output, you can't just select a setting from a menu or slider. Instead, you need to find content that has the desired brightness level, then activate SmartEco mode while that content is on screen. The projector will determine, based on the content on screen, what brightness level is appropriate. It will then lock the projector's output at that level until the lamp mode is changed.
If you really want to take down light output, the easy way to do it is to put up a pure black image and then activate SmartEco. That nets you a reduction of about 70% from the projector's maximum. You can fine-tune the setting by using test patterns of differing brightness, but it would be much easier if the projector just included some kind of manual control. "
I thought Smart Eco just automatically adjusted lamp brightness like an auto iris. Can anyone confirm what was stated in the review?