Finished building the first Lightget device. It takes 230V AC power off the grid and drives a quad array of high-power leds totalling 16 leds. 2 of the arrays are dimmable. It is controlled via a parallel port cable. No protocol is needed for communication and 6 bits out of the 8 are used in this model. Camera shots can be found in the image archive at http://lightget.sourceforge.net/ - comments are welcome on project forums.