How many watts does a televion use?

Answer 1

It entirely depends. Since different models and technologies of television are not the same, they can vary greatly.

Typically, LCDs using LED backlights are the most efficient, using around 40 watts for a 30" screen.

LCDs using cold cathode, neon, and other backlights use a bit more, usually around 50-60 watts for a 30" screen.

CRTs are less efficient, using a more formidable 100-240 watts for a 30" screen.

Plasma is the least energy efficient of all, consuming a whopping 150-300 watts for a 30", although most are larger. a 42" can easily consume a kilowatt!

Unfortunately, I have no data regarding DLPs, OLEDs, CMDs, or projectors, although I know OLEDs are supposed to be more efficient than LCDs.