Summary

Requires minor use of soldering iron.
Re-Use is the best form of re-cycling.

Instructions

Need a USB cable (any unused USB cable as shown in photo).
Need a USB mains plug (any unused USB mains plug).
Need a high output LED (I got mine by buying a front cycle lamp from PoundLand, took it apart, got 5 LEDs).
Need a 1K Ohm resistor (maplin, Farnell or such).
Take the USB cable, cut off the end that does NOT plug into main plug. Strip it back, keeping just the red and black wires, strip them back for connecting (see photo).
Solder the resistor to the +ve contact of the LED.
Solder the black wire to the -ve contact of the LED.
Solder the red wire to the other end of the resistor.
(see photo).
Plug into main socket, plug socket into main, should light (see photo).
Wrap exposed wiring with electrical tape. (see photo)
Print NightLightBase.stl (I used 3 vertical shell perimeters, 3 horizontal perimeters, 1.0 Fill Density, PLA or ABS, any colour, I used white PLA and clear ABS at different times, material really doesn't matter).
Print NightLightStem.stl (same settings as base).
Screw stem into base, thread cable through, you can now plug in to check working.
See pictures for sequential series showing base assembly and wire threading.
Print either NightLightMoon.stl, NightLightMickey.stl or NightLightShStar.stl. I used same shells but 0.2 Fill Density, Clear ABS, gives nice translucent shade. This diffuses the LED nicely.
Slide shade down over stem, Job done.

Running cost:
In use, the light takes less than 1 milli Amp (1 thousandth of an Amp) or less than 5 milli Watts. Virtually free to run, no batteries.
Leaving 60 watt light on, (even with ballast dimmer it still takes 60 watt). This saves a fortune.

Making cost:
Base, stem and upport together weigh 91g, shooting star shade weighs 80g. I bought 1KG Clear ABS plastic off fourstar168 on Ebay for ÃÂ£19.99.
(91+80)/1000*19.99=ÃÂ£3.42 for plastic. The rest was lying around my house unused or needed. Though you can buy the plug and cable together on Ebay for less than ÃÂ£2.

Making time:
Assembly takes me about 10 minutes.
Base and stem I can comfortably to in 1 evening including clean up. Shade takes another evening. Though of course, this is mainly printer running, me doing something else.

Let's face it, if you can attach a jpeg to Thingiverse then this is dead easy.

Kid's Night Light