If we like to project in a dark room, the 2000-ansi-lumen projector will not have the advantage as the 1000-ansi-lumen projector will have enough lumens output under these conditions
to create a clear and sharp images. The reason why is very simple, because there are no, or not enough ambient light to affect the projected image. Conversely lumen output no matter how well, if we like to project in a well-lit room, for example, a company board room, it will be more lumens defined means a better picture, so the 1000-ansi-lumen projector at a disadvantage here.
But we must not forget that in order to be able to comment on the readings and the projected image quality we need to factor in the projected image size. If we, for example, 2000 saw another year-ansi lumen projector and have it project an image of 2 x 1.5 meters and we enlarge the image size to 4 x 3 meters, the surface area of the projected image has been multiplied by four and thus the image brightness projected only a quarter of the original 2 x 1.5-meter images. Thus, the lumen output of a projector is important, but only if you factor in room lighting conditions will be used in and the image size that
you will project. In the case of home theater, the lumen output is not really important factor, because we are always projecting in a dark room and the size of the image is known. Most home theater setup using projector with output of about 500 lumens ansi-lumens for not saturated and reduce the contrast of projected images.