I have CFLs or T-8 Fluorescent in the garage and the sheds but the
lights around the pool are incandescent (15w sign bulbs) and we dim
them most of the time. We dance there ;-)
Most of the lights in and around the house are on motion detectors so
lighting is pretty much lost in the noise on our electric bill.
I put LED flood lights in the backyard area. We have a lot of
landscaping stuff (plants and bushes) out there with a bricked circle
and stone "sitting wall". Used to have a concrete table on it but I
moved that out (wasn't easy ... damn thing weighed about 400lbs) and
put a fire pit in it's place. The LED floods light up the circular area
and the two granite stairs that lead up to it. Looks nice at night.
The floods are 120vac powered, have a DC power supply internal to them
that powers six LEDs (in series). A timer in the cabana controls them.
Also use one of the LED floods to illuminate the flag on our flagpole
at night.
They work great and I am surprised at how bright they are. I have
another but one of the LED's blew out, so none would work. I saved it
for the five remaining LED's in it that I can use to replace any that
burn out in the working floods. Here's a pic taken at night: