Some people are not able to reduce the overall brightness of their monitors enough through the screen controls (brightness is turned all the way down and still too bright). These persons are looking for glare reduction in the sense that the brightness of the screen is too strong. The anti-glare function of the Photodon LCD protective films is to reduce the reflections off the surface of the screen, not to reduce the overall brightness of the screen, we refer to this as glare reduction. A film that would reduce the overall brightness of the screen would be more like a neutral density filter used in photography. In photography a neutral density filter is used to reduce the overall brightness of a scene or in some cases to reduce the brightness of the sky, thus avoiding a washed out image. This is accomplished by placing a neutral density filter in a holder in front of the lens as you take the photograph. Our LCD protective films do reduce the overall brightness of the screen, but by only approximately 10 – 12% for the antiglare and only 8% for the crystal clear film, not a noticeable amount.