At 06:22 31/08/99 -0700, you wrote:
>        1.  Break
>        2.  Mark after break
>        3.  Start Code (0x00 for most lighting devices)
>        4.  Up to 512 bytes where each byte is a lighting level (0x00 to
0xff)

I don't remember the details, but aren't they pairs of address and level?
Nothing in the above tells you which light is being controlled, and you can
have lots of lights/dimmers in parallel on the bus.

Nigel