If you’re interested in how much leaving the computer on all night is actually costing you, you may want to look into an Energy-Use Monitor. Energy-Use Monitors tell you exactly how many kilowatt-hours you are using in your home and can project the cost of the device running for you based on either the pre-programmed national average for electricity, or some will even allow you to customize your personal rate based on your area. Some of these devices will even tell you how many pounds of CO2 you are producing based on the energy that you are using.
There are many on the market right
now, including both corded and direct-plug models. It appears that a
household could save quite a bit of money just by paying attention to
how much it costs to run the halogen floor lamp, or leaving the TV on
when they’re out of the room. It is very common for certain devices
to go unnoticed when they are on, lights for example during the day,
a person may not notice that a lamp was left on, but by turning these
devices off, a large amount of money can be saved over the
course of a year.
According to the reviews on multiple
products, people found these little devices to be a great wake-up
call to how much extra they were paying for the electronics that they
used and forgot to turn off. Pictured below are the Belkin corded
model, and the P3 International direct-plug model, both are available
for purchase on Amazon.