Originally Posted by
wiggin
Energy Star is just the stickers, essentially saying that the appliance beats the federally mandated limit by a determined percentage for each class of devices. It's been expanded from just computers et al to pretty much everything. In addition, most appliances come with an EnergyGuide sticker that includes expected power consumption, comparisons insides its class, and expected cost to operate annually.
There are flaws to both systems, and there's always difficult choices to make when determining something as vague as 'efficiency' or 'typical usage', but I think the general approach is sound. Coupled with appropriate campaigns and incentives to save energy, I think it could be quite effective - without resorting to heavy-handed tactics like outlawing certain devices on the basis of a single spec.