Originally posted by: ironwing
Probably not. If everyone simply turned off their TVs for the duration of the 30-second commercial, it would probably save more energy.
Hence everyone should buy DVRs to save power.
I haven't watched a commercial in a damn long time.
Some devices can use up to half of the running power when they're in standby mode - for example, a DVD player I once had. It uses around 12W when running, but 6W when it's "off."
However, low-power standby circuits are quite possible. I've seen remote-controlled air conditioners that used so little power on standby that my Kill-A-Watt didn't even measure any current draw.
You'd think that sort of thing would be a fairly important concern these days, as more and more appliances use purely electronic control, and thus are likely to use a "soft off" as their normal state. For example, my dishwasher uses an electronic control, thus it needs to have at least some small amount of power to run the processor, so that it can monitor for when the ON button has been pressed.
That would be the case in any such appliance where the primary on/off switch is not directly tied to the main 120VAC line.
These ads probably shouldn't be directed at consumers so much as at designers. Power supplies can be made to use very little power when in standby mode. It just costs a little bit more - and that's where the good old penny-pinching comes in.