Post Calibration: User "best" mode = 757 lumens
That's a good number. About 750 lumens gives you plenty of brightness on larger screens in a darkened environment. A 130 inch diagonal screen is very doable. For lights on, though, the projector doesn't offer a whole lot more. The brightest Mike measured, had a color temp over 10,000K, which means nary a red in sight, plus a strong green push.
It's not a pretty picture, but with 1150 lumens, that's a bit brighter than average in the class.
To get pretty respectable color out of the HD8300, you really will end up with just under 900 lumens. That simply means that when you need more brightness, you can take things up a notch, without sacrificing much in the way of color.