BenQ W1500 Brightness: Calibrated: 1581 Lumens (midpoint on zoom)
Post calibration, the overall image got a little bit warmer. Note however, that white; 100 IRE barely changed, while the rest of the IRE levels increased typically by about 200 IRE. Also note that in eco mode, the projector is already closer to the ideal 6500K across the range.
As a result of the calibration extremely bright areas such as a sunlit face, might be a touch more reddish than ideal, while the balance is close to dead on for the rest of the range.
Almost 1600 lumens at mid-point on the zoom is bright. True, there are low cost cross-over projectors like the Viewsonic PJD7820HD, that measure at brightest, over 3000 lumens, but those cross-over projectors have clear slices in their color wheels. Notice that the measured 3000 lumens plus Viewsonic, when calibrated comes up over 100 lumens less bright than this BenQ calibrated.
Don't confuse the W1500 with one of those business type DLP projectors (with their clear slice color wheels, that dramatically boost brightness at the cost of color, the W1500's color always looks better than projectors like that! (Even when they too get calibrated, but that's because they typically don't calibrate that well. Of course, most of those are sub $1000, but not all!