Automatic power usage calculation

[chimit]

I'm confused about the rules in the Suggestions forum. But I think here's the place to post.
Even though I cannot find a "tracker" link at the top of the forum.

Some remote switches have a current meter built in. So you can display the costs that the particular devices implies.
My suggestion is to add an (optional) power load field in the various on/off switches that are available. For instance if you have a light bulb connect to that switch of 40 watts continuously, you can know the costs without having to add a current meter in the switch.
For instance if the bulb in question is on for one hour, you will know that it used 0.04 KWh. And also you can calculate the costs in $$$ that the bulb costs over a given period.

How about it?

== Rene