It's not too hard, if you took a high school level electronics course. Just pick up a DC
power supply, blue LEDs, and the appropriate resisters.
Look at the specs of the LEDs to compute the value of the resistors needed to drop the DC
voltage enough for the LED
There are lots of detailed directions available on the net: http://www.google.com/search?hl=en&l...LED+moonlights
I suggest if you're not already confortable handling DC
electronics, that you get someone else to check your math and supplies before you assemble or power up the system.