The lower your Gamma rating, the brighter the image will be. If you have any software that adjusts/calibrates your gamma set it to 1.8 This is what Mac's use as well as what most closely matches what a professional level printer will give. Gamma works like this: Input level = Output Level^Gamma So if gamma is 2 and your input is tone level '4' (on the 0-255 scale used in RGB) you will see '2'. Most uncorrected PCs ship at 2-2.2 Gamma. A higher Gamma will result in the mid tones getting darker and darker very fast while the bright and dark ends of the tonal spectrum get only slightly darker in comparrison. It's generall better to adjust Gamma than it is to adjust Bright/Dark. Especially when actually working on images in something like Photoshop (use curves in Photoshop). Bright/Dark controls work by taking away tones at the edge they adjust. So making it bright by say 10% will take the last 10% of the tonal values and display them all as white, then move the remaining 90% of tones to a setting 10% closer to white than they were before. This is why Bright/Dark controls result in washed out displays. And why adjusting Gamma works better. Gamma adjustments leave you with a full range intact.

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