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Brightness is a unit of measurement that represents how much light is emitted by your screen. It is measured in terms of candelas per square meter; cd/m2 (when it comes to TV’s at least). You are probably asking yourself:

“Are brighter TV’s better?”

Well, yes and no. It all depends on where the TV is used and for what. If, for example, you want your TV in a store, or hotel lobby you want to have it as bright as possible, in order to beat out the day light. When a low brightness TV is placed in daylight, it is very difficult to see what is on the screen. However, if you want to use your TV as a home theater TV you will get away with it being not so bright. It all depends on your preferences. Some people are more sensitive to bright light in a dark room than others. High brightness will help when you are watching a movie that takes place mostly in daylight (like Planet Earth, for example), however it will diminish contrast ratio during dark scenes.

Keep in mind that most TV’s will let you adjust the brightness of the screen manually, but only to a certain extent. I would use this feature only when lowering the brightness and not boosting it. Generally speaking LCD HDTV’s have higher brightness levels that Plasma HDTV’s.

low vs high brightness

Personal Observations:

I have a TV that is rated at 1,500 cd/m2 and I am absolutely satisfied with results in both high light scenes and low light scenes, both during a day and night time. But it is better to watch something nice when it is dark in the room.

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