Below find the brightness of each of the Epson's Preset Image modes. Dynamic is the brightest. Living Room is next, but is very cool (try lowering the Color Temp one or two numbers. The color temps shown are measured for white (100 IRE).
The measurements below are all with the 2.1:1 zoom at midpoint. There's a significant boost in brightness changing the zoom to wide-angle (which is where most people measure brightness, but not where most people set their zoom lenses.)
Please note that we did not attempt to find the maximum measurable brightness of this Epson projector, or others for that matter. One can do things like turn up contrast, adjust color temp, etc. to find more lumens. For that reason, in our reviews, virtually all projectors measured come in well below manufacturer's claim. But, the picture looks better than when you hunt for lumens, thereby messing up the picture.
In the table above, note that we provide measured brightness for the three "best modes" for both full power and eco mode here, because those three default to eco mode.
From a competitive standpoint to the more expensive Epson 5030 UB and 6030 UB, the Pro Cinema 4030 is about 15% less bright based on our measurements. That's a little better than the almost 17% drop expected (the difference between 2400 lumens claimed for the UB's and 2000 for the 4030!)