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I've got a Dell S23340M - an LCD monitor with an LED backlight, which has built-in options to adjust the brightness & contrast. The monitor features a nifty "Energy Usage" bar that changes as you increase/decrease the brightness. When I increase the brightness, the energy bar goes up quickly but when I increase the contrast, it stays the same (no matter how high I make the contrast).
At 100% contrast, my monitor is practically a giant flashlight but the energy bar still stays the same. I'm wondering if changing contrast actually does anything to energy usage even though the monitor screen seems to be visibly brighter? (If not, why not?)
4Hi! You wrote about an "LED monitor", which is a confusing and ambiguous term. I edited to clarify. Feel free to re-edit if you disagree. – sleske – 2017-10-02T08:42:11.213
Sorry about that; I'm no tech wiz with monitors lol. The monitor had an "LED" sticker on it so I assumed it was LED. Thanks for the edit! – takanuva15 – 2017-10-02T22:17:46.177