Contrast Ratio
Measurement of the difference in the light intensity between the brightest white and the darkest black.  A higher contrast ratio produces a sharper image and colour representation.  (i.e. 1000:1 is better than 400:1)

Response Time
Total length of time for a pixel to switch on or off.  Basic LCD's have response time of around 20ms (40 frames/sec).  For gaming performance 8ms or lower is better since it can produce fluid motion at 60 frames/sec.

Brightness
This is measured in nits.  Most LCD's have a brightness of 300 cd/m2 or greater.  CRT's are around 100 cd/m2.

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