This link has several suggestions. It is several pages long.
http://forums.woodalls.com/Index.cfm/fuseaction/thread/tid/25843585.cfmBasically I replaced a few light bulbs that look like car taillights with LED panels that have 24 each 5050 LED emitters. These put out about the same light as the bulb they replaced, but use about 1/4 the energy.
For the porch light, I removed the bulb holder, put in some sheet metal to mount 4 of the LED lights to it, then put on the cover. It now draws 1/2 amp and is much brighter. It used to draw 1.1 amps.
Fred.