Whats the temps like idle though with it on?
You might as well have kept it on anyways. For one thing, your not being very economical
I bet my computer uses quite a bit less power when its in an idle state, for instance, if a programs been open for ages, or just listening to music.
You'll find it'll still be running in almost idle mode when doing low tasks, like navigating around, which doesn't need much CPU still if programs, etc are stored in memory.
My CPU's running at 49 degrees C load.