Yes you do, in spades..

I replaced all light bulbs i could with CF bulbs. Where the biggest savings came from were the porch and front door lights.

The things last for years, and give you the same lumen output.

I looked into the LED "bulbs", but they're just too expensive right now.

I save on average 10 to 20 dollars a month versus when I was using incandesant bulbs.