Although this Optoma did not come particularly close to their 2500 lumen claim (remember we don't measure for maximum brightness, but maximum watchable brightness), the almost 1800 lumens still makes it one of the brightest home projectors around.
With Brilliant Color set to 10, there's plenty of brightness for tackling ambient light, as this picture shows
So far, most of the bright new projectors out there tend to measure between about 1500 to 2200 lumens, the way we do things. That makes this a nicely inexpensive light canon.
Brightness is more dependent on the Brilliant Color setting than which mode you select. In fact, if you look at the less bright modes on the chart on the performance page, you would find that they have lower Brilliant Color settings, than those who measure highest (Bright, with BC at 10).
Brilliant Color not only adds brightness, but also a certain amount of pop to the image. By that, I'm saying the image looks particularly dynamic.
Room conditions - exposure set to show how the room looks - sunny day
That's a very good thing when fighting ambient light, but if you are looking for the most natural looking picture, and skin tones, that won't be with Brilliant Color at 10. For comparison, Cinema looks better/more natural, and its Brilliant Color setting defaults to 5, which means that mode is good for only 1123 lumens, our about 1/3 less than modes with Brilliant Color at 10.
In other words, when you don't need all the brightness of the "brightest" modes, just dial down the Brilliant Color, giving up significant brightness, but improving the naturalness of the picture.