Been experimenting with those LED night lights you can get at Wal-Mart, Home Depot, and such places. They're pretty good, and they're getting better. So far, the one I like best is this Amerelle Directional NiteLite. Bought a pair a few months ago, then bought another pair a week ago. The newer pair is noticeably brighter. I use one in a reading lamp, with one of those converters that converts a screw in socket to a wall outlet style plug in. (That notion that reading in low light is bad for the eyes is a big fat myth.) The older one was barely enough light and I had to hold the book at just the right angle. The newer brighter one makes books readable at most angles.
They're very nice for that midnight snack or trip to the bathroom. No having to choose between turning on the lights and blinding yourself, or fumbling in the dark. Some of those night lights are a bit too directional with the lighting and will shine into your eyes at just the wrong angle, but can be dealt with by plugging them in upsidedown.
I've had an LED night light in my bathroom for quite awhile now. It has 9 LED's and uses .6W.
I've also used those LED "night lights", as a way to light up hallways with enough light that you don't trip.
And another useful thing I've sometimes done with LED lighting, is to combine the LED light modules with a traditional compact florescent in a multiple bulb fixture. The end result, is that some (dim) light comes on "instantly" when you flick the switch, followed by the CF lighting up a little (a second or two?) later (to supply the main light). This not only solves the problem of getting at least a little light "right away", it also helps your eyes adjust to the brighter light, by first hitting you with dimmer light (the LEDs only) before the main CF light comes on.
Oh yeah, I've also used the "night lights" with those screw in adapters (as the saying goes: "great minds think alike"). Although I sometimes just spend a little more, and directly buy the LED modules that are designed to screw into a normal socket (vs getting the "night lights", and then messing with an adapter). So I guess I've taken both approaches with LED lights for the home...
My favorite ones are actually electro-luminescent. I don't recall the brand, but they use .3W and cast a very diffuse low light. The LEDs as nightlights that I have seem so far are just too bright for my taste.
We did finally replace the night lights in the kid's rooms with LEDs and they don't seem to mind them. It seemed like they were complaining about burnt out bulbs every other month with the incandescent ones.
i like to make my own night lites. i use old cell phone chargers, or other transformers. i take the cases apart and drill a few holes to add some led's in. then add a small homebrew full wave rectifier and smoothing capacitor. finally plug in the numbers into an led calculator to see how many led's i can fit and what size current limiting resistor i need.
most of the commcerial made led plug in lites use half wave rectifiers and no smoothing capacitor, so there is significant wasted power in them.
i have a light with 45 led's that i made myself and it takes about 4 watts to run. it puts out the equivalent light of a 40watt incandescent. thats ridiculously efficient.
We bought several strings of the LED holiday lights last year and put two of them up in our wysteria that surrounds the front porch. They have been there ever since and are still working great even after being left on 24/7. Even if they didn't save a penny on energy, just lasting through so much use is a huge bonus.