On Sun, 27 Jan 2008 07:30:36 -0800 (PST),
wrote:

I use three, 300 watt 12 volt Maulibu type transformers to light my
yard and walkway lights around my home.

I was under the impression the reason one would use 12volt instead of
line voltage was the 12v was less costly to run.

How do I determine how much power each of these is drawing (per hr?)
so I calculate my cost per month. I don't think it will matter, but
one of them is only drawing about 160 watts. Each of the others is
near their 300 watt limit.

Thx


Try this:

http://the-gadgeteer.com/review/kill...monitor_review