Over the past few months, I have been gradually swapping some of the
most used lamps over to LED versions. 3.5w for those areas where a bit
of background light is needed, leaving 20w CFL's in place where
occaisional bright lights are needed. 2x 3.5w LED's to replace a 38w
double D CFL which originally illuminated the drive and is on a solar
clock.

My latest change has been to swap some ancient kitchen ES downlighters.
When I originally installed these I intended them for 100w ES reflector
flood lamps. These tended to be in use much of the day, when the
kitchen was in use, so they needed frequent replacement, expensive and
were a large consumer of watts. Several years ago I replaced them with
22w CFL's but due to the recessed fitting, the light was never that
good, so I ended up supplementing it with a concealed 70w tube.

I recently ordered up some 12w ES LED flood lamps hoping they might
provide a better light, better economy and last longer. I don't yet
know about the 'lasting longer', but they provide a much better, more
even light and brighter light than either the 100w floods, or the CFL's
gave. In addition, due to the overall lamp swapping - consumption has
gone down quite markedly.