How can we measure what we can’t see? Electricity provides a particular challenge in this regard. Even though we’re told turning off lights saves energy and money, many people continue to leave lights on, unaware of how much power they’re actually consuming.  What’s more, many devices we use today maintain a low-level of power usage, often referred to as “vampire power” or standby power, even when we think the device is off.   Electronics such as computers, stereos and televisions are highly to blame in this regard.  There is however light at the end of the tunnel.  Google has recently released a new application called PowerMeter that will allow individuals to connect to their utility and view their up-to-date energy usage via iGoogle.   While testing is still in progress and the complete version is planned for roll-out later this year, the idea is a brilliant one, and one that may change the way we look at and use electricty moving forward.